FROM BALANCE TO CONCERT:
A Study of International
Security Cooperation
By ROBERT JERVIS*
INTERNATIONAL anarchy and the security dilemma make cooperation
among sovereign states difficult. Indeed, when international
politics is viewed from this perspective, the central question is not, "Why
do wars occur?" but "Why do wars not occur more often?"' We should
therefore explore the conditions under which the major states try to
gain security through joint efforts. What is important here is that these
conditions can be derived from the theory of cooperation under the
security dilemma:
The first point is quite obvious. There are no cases of world government,
world federation, or even a worldwide pluralistic security community.
The closest thing is the concert system, which has occurred only
three times in modern history-from 1815 to 1854 (although in its
strongest form it only lasted until 1822), 1919 to 1920, and 1945 to 1946.
The term "Concert of Europe" is often applied to late 19th-century
international politics, but the pursuit of self-interest was not sufficiently
transformed to justify this label. The two 20th-century concerts were
very brief, and one can argue that they did not really come into existence
* I am grateful for comments by Robert Art, Alexander George, Joanne Gowa, Deborah
Larson, Paul Lauren, Glenn Snyder, Stephen Walt, Kenneth Waltz, and the other contributors
to this volume.
, For the concept of the security dilemma, see John Herz, "Idealist Internationalism and
the Security Dilemma," World Politics2 (January 1950), 157-80; Herbert Butterfield, History
and Human Relations (London: Collins, 1951); Arnold Wolfers, Discordand Collaboration
(Baltimore: Johns Hopkins University Press, 1962), 83-90. In Man, the State, and War (New
York: Columbia University Press, 1959), Kenneth Waltz noted that using anarchy as the
starting point implies that it is peace, not war, that needs to be explained.
For general discussions of the problems of cooperation in the absence of supernational
sovereignty, see Robert Jervis, "Cooperation under the Security Dilemma," World Politics
30 (January 1978), 167-214; Robert Axelrod, The Evolution of Cooperation (New York: Basic
Books, 1984); Robert 0. Keohane, After Hegemony (Princeton: Princeton University Press,
1984). For treatments of this problem from the perspective of international law, see Gerhard
Niemeyer, Law WithoutForce(Princeton: Princeton University Press, 1941); Michael Barkun,
Law Without Sanctions (New Haven: Yale University Press); Terry Nardin, Law, Morality,
and the Relations of States (Princeton: Princeton University Press, 1984); and Friedrich
Kratochwil, "Following Rules," unpub. (Columbia University, 1984).
FROM BALANCE TO CONCERTC
at all. At a minimum, there was a short period of extensive cooperation,
and many statesmen and observers had at least some hopes for a longerlasting
concert.
The best example we have comes from the years immediately after
1815. In essence, the concert was characterized by an unusually high
and self-conscious level of cooperation among the major European powers.
The states did not play the game as hard as they could; they did
not take advantage of others' short-run vulnerabilities. In repeated plays
of the Prisoners' Dilemma, then, each state cooperated in the expectation
that the others would do the same. Multilateral and self-restrained methods
of handling their problems were preferred to the more common
unilateral and less restrained methods.3
More frequently, states are restrained only externally, by what others
are doing, or by the anticipation of what others will do if they act against
the others' interests. This pattern characterizes the balance of power.
Under the balance of power, a number of restraints are evinced: no
state gains dominance, wars do not become total, unconditional surrenders
are rare, the territory of losing states is not divided up among the
winners, and usually the loser is soon reintegrated into the system. These
restraints arise from the clashing self-interests of the individual states.
They will work together to prevent any state from dominating; but
because today's enemy may be tomorrow's ally and vice versa, it does
not make sense to be too harsh with the defeated state. Indeed, since
each member of the winning coalition worries about excessive growth
in its partners' power and fears that they may be planning a separate
peace with the adversary, there may be competition among the allies to
see who can be most reasonable toward the loser. Although the results
of these competitive dynamics are restrained as states block each other's
ambitions in order to maintain their own power, it is hard to see this
situation as mutual cooperation and an escape from anarchy and the
security dilemma. In fact, the latter are the very forces that drive the
system.
3Jervis, "Security Regimes," InternationalOrganization 36 (Spring 1982), 362-68; Richard
B. Elrod, "The Concert of Europe: A Fresh Look at an International System," World Politics
28 (January 1976), 159-74; Paul Gordon Lauren, "Crisis Prevention in Nineteenth-Century
Diplomacy," in Alexander George, with others, Managing U.S.-Soviet Rivalry (Boulder, CO:
Westview Press, 1983), 31-64. Paul Schroeder argues that, contrary to the commonly held
view, Metternich did not fit the description ofa concert statesman. See Schroeder, Metternich's
Diplomacy at its Zenith (New York: Greenwood Press, 1969), 251-66 and throughout. Matthew
Anderson argues that Alexander I is the best model of such a statesman who had "a
real sense of European responsibilities and a willingness to make sacrifices to meet them."
See Anderson, "Russia and the Eastern Question, 1821-41," in Alan Sked, ed., Europe's
Balance of Power, 1815-1848 (London: Macmillan, 1979), 82.
59
I. ASSUMPTIONS OF THE BALANCE OF POWER AND THE CONCERT
The balance of power normally maintains itself. The fortunes of
individual states rise and fall, but the system usually continues. Why
does this continuity sometimes fail, and why does a concert system arise?
The most obvious clue is provided by the timing of the concerts. They
occur after, and only after, a major war fought to contain a potential
hegemon. That is not a coincidence; such a war undermines the assumptions
of a balance of power system and alters the perceived payoffs
in a way that facilitates cooperation.
Although scholars disagree about many aspects of the balance of
power, most would concur that the following four assumptions are
crucial to its operation. 4
First, there must be several actors of relatively
equal power. The minimum number is two (although perhaps one large
power can be balanced against several smaller ones). Second, all states
must want to survive. They may seek expansion, and usually some of
them do. But the condition that is necessary-and usually easy to meetis
that they are not anxious to form a confederation with one another.5
(These two assumptions do not enter into the rest of the analysis and
so can be set aside.) Third, states must be able to ally with each other
on the basis of short-run interests. To use Liska's term, there must not
be many strong "alliance handicaps."6
The states cannot be so constrained
by ideologies, personal rivalries, and national hatreds that they are unable
to align and realign on the basis of what is necessary to maintain their
security. Finally, war must be a legitimate instrument of statecraft. That
is not to say that it is welcome, but that states believe they can resort
to the use of armed force if they believe it to be helpful.
Concert systems form after, and only after, a large war against a
potential hegemon because such a conflict alters the last two assumptions
and increases the incentives to cooperate. The war weakens the assumption
of the absence of alliance handicaps in two ways. First, it leads
to unusually close bonds among the states of the counter-hegemonic
coalition, even though disputes and hostility within the coalition never
disappear. It is hard to form such a coalition in the first place, and even
4For a somewhat different list of criteria, see Inis Claude, Powerand InternationalRelations
(New York: Random House, 1962), 90-91.
5The frequent argument that the balance of power assumes that states seek to maximize
their power is unnecessary and leads to confusion. See Kenneth Waltz, Theory ofInternational
Politics (Reading, MA: Addison-Wesley, 1979), 1I8, 126, and Robert 0. Keohane, "Theory
of World Politics: Structural Realism and Beyond," in Ada Finifter, ed., PoliticalScience:
The State of the Discipline (Washington, DC: American Political Science Association, 1983),
514-15.
6George Liska, Nations in Alliance (Baltimore: Johns Hopkins University Press, 1962).
WORLD POLITICS60
FROM BALANCE TO CONCERT
the shared experience of fighting a winning war does not remove all
sources of friction. But it does tend to produce significant ties among
allies. Probably more important in undermining the assumption of no
alliance handicaps-and a factor contributing to the bonds among the
allies-is the belief that the defeated hegemon is not a normal state.
Under the balance of power, all states are potentially fit alliance partners;
none is seen as much more evil than any other. But a war against a
potential hegemon alters this belief. France after the Napoleonic wars
and Germany after the two World Wars were not seen as similar to
other states. Instead, they were thought to be ineradicably aggressive.
The supposed causes for this aberrant behavior varied; reasons have
been sought in national character and climate, in the importance of an
authoritarian family structure, or in geography. Whatever the cause, the
consequence is that the defeated state is seen as a potential danger in
the future. Thus, even though the victors may reintegrate the losing
state into the international system-as the powers did after the Napoleonic
wars-a significant part of the purpose of doing so is to continue
to restrain it.
The balance-of-power assumption that war is available as a normal
policy instrument is also undermined by the conflict with a hegemon.
Such a war will be long and destructive because it is fought against a
powerful and strongly motivated state, and requires something close to
total victory. After such an experience, the winners will be highly sensitive
to the costs of war and will therefore be hesitant to resort to armed
force unless their most vital interests are at stake. That is particularly
true because in most cases the war against the hegemon will have been
accompanied by, or will have led to, large-scale social unrest.
Concert systems decay, and indeed only the first of them lasted a
significant length of time. Different factors were at work in each of the
three periods, but in general the passage of time alters the unusual
postwar situation and reestablishes the balance-of-power assumptions.
As the memories of the war fade, the bonds erode that helped to hold
the blocking coalition together. Friction tends to build as each state
believes that it is sacrificing more for unity than are the others. Because
of perceptual dynamics, each will remember the cases in which it has
been restrained, and ignore or interpret differently cases in which others
believe they acted for the common good. Fear of the state that had
earlier sought hegemony is also likely to decline over time. Unless it
gives continued evidence of unreasonable behavior, the others may well
decide that it is not particularly evil or aggressive after all. The painful
memories of the enormous costs of war also become dimmer as time
61
passes, and a new generation, with no first-hand experience of the war,
comes to power.
11. CONCERT SYSTEMS AND THE SECURITY DILEMMA
The factors that explain the transformation of a balance-of-power
system to a concert and back again can be seen in terms of variables
that heighten or ameliorate the security dilemma. Four kinds of factors
are important here: changes in the relations between offensive and
defensive strategies, changes in the payoffs, changes in the ability to
determine what others are doing and to make appropriate responses
(transparency and timely warning), and changes in the estimates and
predictions of what others will do.
A. OFFENSE-DEFENSE BALANCE
The virulence of the security dilemma is influenced by whether offensive
weapons and strategies can be distinguished from defensive ones,
and whether the offense is more potent than the defense.7 Even when
the states want to cooperate, they may not be able to when offensive
and defensive motivations lead to the same threatening behavior, and
when actors believe that it is better for them to take the offensive and
strike the first blow rather than to let the other side strike first. Under
such conditions, there is no way for states to increase their security
without menacing others. When these conditions are reversed, however,
mutual security is possible.
This argument has usually been applied to military systems, but the
logic holds in the political arena as well. Under the balance of power,
offensive and defensive strategies are likely to be similar, and the offense
often has the advantage.as states can capitalize on the temporary weaknesses
of others. Because many wars are short and decisive, there is an
emphasis on making immediate gains and avoiding immediate losses.
The obvious fear is that the latter will pyramid, and the obvious hope
is that the former will set off a positive feedback. On the tactical level
7 Jervis (fn. 2), 186-214; George Quester, Offense and Defense in the InternationalSystem
(New York: Wiley, 1977).
8 Stephen Van Evera, "The Cult of the Offensive and the Origins of the First World
War," InternationalSecurity 9 (Summer 1984), 58-107; Jack Snyder, "Civil-Military Relations
and the Cult of the Offensive, 1914 and 1984," InternationalSecurity 9 (Summer 1984), 1o8-
46; Snyder, The Ideology of the Offensive: Military Decision-makingand the Disastersof 1914
(Ithaca, NY: Cornell University Press, 1984); Jack Levy, "The Offensive/Defensive Balance
of Military Technology: A Theoretical and Historical Analysis," InternationalStudies Quarterly
28 (June 1984), 219-38; Barry Posen, The Sources of Military Doctrine: France, Britain,
and Germany Between the Two World Wars (Ithaca, NY: Cornell University Press, 1984).
62 WORLD POLITICS
FROM BALANCE TO CONCERT
as well, offensive strategies are often appropriate. Taking others by
surprise is perfectly legitimate, and likely to be efficacious.
Under the concert, the situation is quite different. The expectation
that the system of mutual restraint will last means that there is less stress
on making short-run gains and less fear of short-run losses. Because
states are less likely to take advantage of temporary imbalances, they
need not act quickly in the anticipation that if they do not, others will
take advantage of them. Indeed, taking advantage of others (that is,
failing to cooperate with them when they are cooperating with you) is
likely to be self-defeating. It endangers the system and may well be met
by negative sanctions from the other members. Under the balance-ofpower
system, others will oppose this type of behavior only if they believe
that doing so is in their immediate self-interest. Under the concert, these
calculations are diluted by the states' interest in maintaining a high level
of cooperation. Thus, states that are too ambitious and seek excessive
gains are likely to be opposed by a broader coalition acting to maintain
the concert. In this situation, defensive political strategies are likely to
be different from as well as more attractive than offensive ones.
Because a large counter-hegemonic war undermines the balance-ofpower
assumption that wars are a normal tool of statecraft, defensive
strategies gain a further advantage. If war is seen as likely in the near
future (as it often is under the balance of power), incentives may be
high to undertake a preventive or a preemptive war. The alternative to
going to war now may not be the maintenance of peace and the status
quo, but being attacked later. If conditions are propitious, if the state's
alliance structure is intact, if the temporary distribution of power is
favorable, then a war is likely in a balance-of-power system, irrespective
of the state's general intentions; the state need not seek expansion in
order to initiate a war. By contrast, when states think that war can be
avoided for a long period of time, even conditions conducive to war are
less likely to lead to fighting because the payoffs for not initiating conflict
are higher than they are when war is used as a normal policy instrument.
Thus, if states are willing to live with the status quo, they are freer to
follow defensive policies.
When defensive policies are more effective than offensive ones, states
that support the status quo need not seek protection through expansion;
when offensive goals are sought by policies that differ from those used
to reach defensive ones, it is easier for status quo powers to identify
each other. By and large, these expectations are borne out by international
politics in the period between the Napoleonic and the Crimean wars.
It seems that at that time, two common problems inhibiting cooperation
63
among status quo states were less pressing. Only infrequently did states
have to gain their own security at the expense of that of others, and
identification errors were relatively rare-in part because of the differentiation
between offensive and defensive postures. These conditions
facilitated cooperation both by reducing the number of cases in which
status quo powers mistook each other for aggressors and by making
states less fearful of the danger that what was intended as mutual
cooperation would be seen as appeasement.
B. CHANGES IN PAYOFFS
The development of a concert system is supported by changes in the
payoffs. Games that are structured as Prisoners' Dilemma will vary in
the likelihood of leading to mutual cooperation according to the cardinal
value of the utility of the various outcomes. Prisoners' Dilemmas in
which the payoffs for CC are relatively high and those for CD, DC,
and DD are relatively low are more likely to yield cooperative solutions.9
In other words, cooperation is more probable when mutual cooperation
is only slightly less attractive than exploiting the other, when being
exploited is only slightly worse than mutual competition, and when the
latter outcome is much worse than mutual cooperation. The concert
arises largely because the payoffs fit this configuration.
INCREASED COSTS OF NON-COOPERATION
In discussing the post- 1815 period, Medlicott argues that "it was peace
that maintained the Concert, and not the Concert that maintained
peace."o There is something to this-the high perceived cost of war
was an important factor. But the point should not be pushed too far.
Knowing that statesmen want to preserve the peace does not tell us how
they would go about trying to reach this goal, or whether they would
succeed. Indeed, the standard problem in the security dilemma is that
although all actors desire security, the interaction oftheir efforts produces
general insecurity. Nevertheless, their strong motivation to avoid war is
probably a necessary condition for the maintenance of a concert. Thus
it is important that a war against a hegemon increases the costs of mutual
non-cooperation. The former allies know that if they get into heated
squabbles with each other, the defeated enemy will take advantage of
9Jervis (fn. 2), 167-86. Note that this is not the same as saying that the chances for
cooperation increase as the payoffs for cooperation increase and those for defection decrease.
It is equally important that payoffs for outcomes in which one side defects and the other
cooperates be moderate-that the former not gain too much or the latter suffer too greatly.
- W. N. Medlicott, Bismarck, Gladstone,and the Concertof Europe(New York: Greenwood
Press, 1969), 18.
64 WORLD POLITICS
FROM BALANCE TO CONCERT
the splits. Although they are not unwilling to use the former enemy
against their former allies (Britain did so with France soon after the
Napoleonic wars), disagreements are muted by the fear that if they are
carried too far, the war against the hegemon may have to be fought all
over again. However, conflict is not entirely out of the question." The
very fact that each state knows that the others see war as too costly to
be a viable option allows each to use the common interest of avoiding
catastrophe as a lever to extract competitive gains. But because the costs
of war are high, states have incentives to reduce conflict, and are willing
to run substantial risks of being exploited in order to decrease the chance
that their policies will lead to unnecessary competition.
Costs of anarchyand revolutions. To the extent that statesmen believe
that the previous war was caused in part by anarchy in general, and by
economic rivalries in particular, there are additional incentives for cooperation.
The views of Woodrow Wilson fit into the first category.
Wilson saw the balance-of-power system as one of the main causes of
World War I; he concluded that, in order to avoid future wars, greater
international cooperation-in the form of the League of Nations-was
necessary. Similarly, many Americans believed that the Depression and
the economic rivalries of the interwar period were significantly responsible
for the rise of Hitler and World War II. U.S. decision makers
therefore felt that economic cooperation was important not only for the
economic gains it would bring, but also to reduce the chances of a future
war.
After the Napoleonic Wars, the incentives for unity were increased
by the conviction that wars and revolutions were linked. Each could
lead to the other, and so both were dangerous. There were differences
of opinion and of interest among the powers on this point: the liberal
powers-Britain and France-were both less threatened by unrest and
less worried that revolutions would automatically spread. They (especially
Britain) opposed the use of the concert to sanction counter-revolutionary
interventions because they saw such actions as mere covers for
narrow national interests, and because they perceived many revolutions
as good, or at least as not evil. Nevertheless, even they feared radicalism
in its most extreme forms; this fear produced more of a common basis
of understanding than is usual in international politics.
" Serious threats of war were made on several occasions. See, for example, the incidents
and attitudes discussed in Roger Bullen, Palmerston, Guizot, and the Collapseof the Entente
Cordiale (London: Athlone, 1974), 54; Harold Temperley, The Foreign Policy of Canning,
1822-1827 (London: Cass, 1966), 81-83, 371; Gordon Craig, "The System of Alliances and
the Balance of Power," in J.T.P. Bury, ed., New CambridgeModern History, X, The Zenith
of European Power, 1830-70 (New York: Cambridge University Press, 1960), 254-57.
65
States have often welcomed unrest within their rivals' and neighbors'
territories because it weakened them.- But if the revolutions were likely
to spread, they would be a menace to all. As late as I&54, the King of
Prussia wrote: "I shall not allow Austria, the incovenient, intriguing
Austria, to be attacked by Revolution, without drawing the sword on
her behalf, and this from pure love of Prussia, from self-preservation."3
At that time, states were interdependent in their internal security, which
limited their foreign policy goals and means. It limited their goals because
the chance of revolution would be increased if they were to defeat another
regime too completely, to humiliate it, or even to deny it a share of
international influence on which its domestic legitimacy rested in part.
A too narrow conception of self-interest would therefore be selfdefeating,
not because the other would retaliate, but because the other
might suffer a revolt. The shared fear of unrest also limited the means
of statecraft, in that statesmen in this period largely forswore the tool
of fomenting revolutions to undermine unfriendly regimes abroad. The
absence in the concert of this common tactic in the balance of power is
striking, and contributed to mutual cooperation. Indeed, in one case in
which a statesman was believed to have made a threat of creating unrest,
others reacted very strongly, arguing that this behavior was both dangerous
and a breach of the way the great powers had pledged to act. 4
Opposition to revolution also facilitated cooperation by forming three
bases for reintegrating France into the system. First, the hegemon that
had been such a threat could be seen in part not as France, but as
revolutionary France. Combatting the latter was not inconsistent with
establishing good relations with the former. Indeed, the new French
regime was as much the enemy of revolutionary France as were the
members of the grand coalition. (This logic would also seem to apply
to Germany after the two World Wars. Nascent efforts to define the
enemy as the old regime failed in 1918 largely because of the pressure
of public opinion-a factor that lies outside the structural explanations
offered here. They succeeded after 1945, but in a context of competition
between the two main powers, a point to which we will return.) Second,
France could hope to overturn the Vienna system only by engaging in
a large war. Such an effort would require the mobilization of enormous
domestic resources, which in turn would call for a revolutionary regime.
But that would have been as much of a menace to France's rulers as it
- Geoffrey Blainey, The Causes of War (New York: Free Press, 1973).
3 Quoted in F. H. Hinsley, Power and the Pursuit of Peace (Cambridge: Cambridge
University Press, 1963), 221.
4Temperley (fn. iH), 383-84.
66 WORLD POLITICS
FROM BALANCE TO CONCERT
would have been to the neighboring states. Thus, France was to a
significant extent self-deterred, and could therefore be trusted-at least
to a degree. Third, renewed revolution in France was less likely if France
was treated fairly in the international arena. It was therefore important
for the other countries to establish the legitimacy and efficacy of the
new regime in the eyes of its people.
INCREASED GAINS FROM COOPERATION
The other side of this coin is that fighting a potential hegemon leads
to higher postwar payoffs for cooperation among the former allies. First
of all, the vital goal of ensuring that the past enemy will not again seek
dominance can be reached only by maintaining cooperation. To the
extent that this interest leads to cooperation on other issues-for example,
trade, scientific and cultural exchanges, joint efforts to deal with common
problems-states are likely to have heightened expectations of the benefits
of working together on a broad front. Common goals give each
state a stake in the well-being of the others: to the extent that they
expect to cooperate in the future, they want all to be strong, especially
if they think they may again have to contain the former enemy. Far
from states' values being negatively interdependent (as is often the case
in world politics), they are positively linked: each gains if the other is
satisfied, and willing and able to carry out its international obligations.
Furthermore, the experience of fighting the hegemon can produce at
least a slight degree of altruism. During the war each of the allies may
come to value its partners' well-being-not only for the greater contribution
to the common good, but as an end in itself. If this altruism
carries over into the postwar period, each state will see added benefits
in cooperating because of the expectation that all would gain. There
may be a similar effect at the elite level: decision makers in each country
may develop sufficient ties with their opposite numbers so that each
wants the others to stay in power-a goal to which cooperating with
the other states is likely to contribute.
Differences in the potential gains from cooperation help to explain
why a lasting concert could be formed after the Napoleonic Wars, but
not after World Wars I and II. Because Germany was divided after
1945, maintenance of the coalition was not necessary to ensure that it
would not seek dominance again. Indeed, reducing the danger from
Germany was the purpose of the Morgenthau Plan originally endorsed
by Roosevelt, and is at least partly responsible for the fact that few
statesmen in either East or West have given more than lip service to
the goal of reunification. In large part, of course, the division of Germany
67
grew out of the separate occupation zones because of the general dispute
between the United States and the Soviet Union. Had the Allies been
able to cooperate on other issues more safely, Germany might have been
reassembled. Furthermore, dividing Germany was a way of managing
the superpower conflict. Trying to reach joint decisions that would
govern the entire country would have been a source of much greater
tension and dispute than allowing each side to control its sector. Still,
by keeping Germany divided, and thus less of a menace, the Allies
removed one of their major incentives for postwar cooperation.5 The
main dangers that Germany continued to pose-such as the acquisition
of nuclear weapons by either half, or attempts to reunite-could best
be managed by each superpower acting independently.
Bipolarity and the development of nuclear weapons allowed the
superpowers to limit the danger of war, without a concert. Unilateral
and competitive (rather than joint and cooperative) policies were effective
in safeguarding the American and Soviet core values. After 1815, by
contrast, there was no way any one of the great powers, with the possible
exception of Great Britain, could have maintained its security by acting
alone.
After World War I, Germany remained whole; neither bipolarity nor
nuclear weapons existed to allow the victorious powers to gain security
without cooperation. And yet, a stable concert could not persist, in
seeming contradiction to our theory. Part of the explanation is that the
withdrawal of two of the major states (for idiosyncratic, domestic reasons)
meant that it was far from certain that the two remaining powers
could maintain the peace even if they cooperated. Had the United States
and Russia remained in the coalition, the pressures would have increased
on Britain and France to work together. Indeed, many of he postwar
disputes sprang from the fact that Britain would not guarantee France's
security, thus forcing the latter to take strong unilateral measures against
Germany. Britain's offer of such a pact had been conditional on American
participation, which was not forthcoming. Cooperation was therefore
inhibited by factors of domestic politics, and these lie outside the
realm of the theory elaborated here, which is structural. 6
5As early as May 1946 the British Foreign Secretary, Ernest Bevin, understood this. He
noted that one cost of keeping Germany divided was that "we should have lost the one
factor which might hold us and the Russians together, viz. the existence of a single Germany
which would be in the interest of us both to hold down." Quoted in Alan Bullock, Ernest
Bevin, ForeignSecretary (London: Oxford University Press, 1985), 268; emphasis in original.
French strength after 1815 as a source of cohesion of the concert is discussed in Roy Bridge,
"Allied Diplomacy in Peacetime: The Failure of the Congress 'System,' 1815-23," in Sked
(fn. 3), 34-53.
16 For discussions of how American domestic constraints affected the chances of Soviet-
68 WORLD POLITICS
FROM BALANCE TO CONCERT
DECREASED FEAR OF EXPLOITATION
In many cases, the factor most responsible for the lack of cooperation
is each state's fear that it will be exploited if it cooperates. After a
counter-hegemonic war, these fears are lowered by the transformation
ofthe system. Because all members of the coalition value the maintenance
of the concert, there is a good chance that they will defend it. This
means that they will provide at least some support and assistance to a
state that has been double-crossed. For instance, if State B reacts to State
A's cooperation by exploiting it, States D, E, and F can be expected to
help A, or, at minimum, not to increase its distress. Thus, there is a
"safety net" under the states. Although exploitation is possible, its consequences
are likely to be kept within manageable bounds by the reactions
of others.
If this type of cooperation is to work, however, there must be more
than two major states in the system. The fact that this was not the case
after World War II may have contributed to the quick breakdown of
cooperation. Even if Waltz's arguments about the greater stability of a
bipolar system are correct,' 7
it may be harder to maintain a high level
of cooperation when there are only two main actors in the system.
Although each can use the threat of all-out war to protect its vital
interests, the fact that other states cannot do much to decrease the costs
of superpower defection increases the two sides' fear of exploitation, and
so makes cooperation more difficult to establish and maintain.
Changes in vulnerability. The costs of exploitation decrease as states'
vulnerabilities decrease. The security dilemma is especially severe if one
defection can destroy a state (for instance, by a surprise attack). If states
are strong enough so that a few defections cannot cripple them, they
can better afford to take chances on cooperation. The effect of a major
war on the costs of later defections is mixed. On the one hand, such a
war is likely to exhaust the participants and produce prodigious internal
strains; to the extent that states believe that they are too weak to survive
if they are forced into a conflict under unfavorable circumstances, the
fear of defection and the pressures for preventive war may grow. On
American cooperation after World War II, see Robert Dallek, Franklin D. Roosevelt and
American ForeignPolicy, 1932-1945 (New York: Oxford University Press, 1979); John Gaddis,
The United Statesandthe Originsofthe Cold War, 1941-1947 (New York: Columbia University
Press, 1972); and Alexander George, "Domestic Constraints on Regime Change in U.S.
Foreign Policy: The Need for Policy Legitimacy," in Ole Holsti, Randolph Siverson, and
Alexander George, eds., Change in the InternationalSystem (Boulder, CO: Westview Press,
1980), 233-62.
'7 Kenneth Waltz, "The Stability of a Bipolar World," Daedalus93 (Summer 1964), and
Waltz (fn. 5).
69
the other hand, if the experience of a successful war against a hegemon
gives the states a sense of confidence that they can meet challenges, they
will be more relaxed about the danger of defections. One reason why
a lasting concert could be formed after 1815 but not after 1945 was the
weakness of many of the important participants in the latter period.
Most of the European states-which were stakes in the game more than
they were players-had been broken by the war, and the United States
feared that they could easily fall under Soviet influence. Even more
important, the Soviet Union was so weak that it could not afford the
sort of cooperative arrangements that would open it to Western influence
while subjecting it to the danger of a powerful defection.
In many cases, a postwar settlement will make cooperation easier by
reducing the states' vulnerabilities. Borders are often changed to correspond
with salient ethnic and geographic lines. To the extent that
states become more ethnically homogeneous and establish their borders
along the lines of natural fortifications like rivers and mountain ranges,
they can defend themselves more easily, thereby reducing the costs of
defection.
DECREASED GAINS FROM EXPLOITATION
If the states are sometimes pushed to defect because of the fear of
the deleterious consequences that will follow if their cooperation is met
by the defection of others, they can also be pulled to defect by the positive
gains that such a policy can provide. And, in the same way in which
the configuration of the postwar world reduces the costs a state will pay
if another defects, it reduces the gains that will accrue to the state if it
defects itself. The state will have to expect that its defection will meet
opposition not only from the particular state it is harming, but also from
others in the old coalition. Even if the use of threats and force produces
short-run gains, the long- and medium-run effects are likely to be less
favorable than they would be under the balance-of-power system. Because
of the general commitment to the maintenance of the concert,
"bandwagoning" is less likely than it would be under the balance of
power.'8
To the extent that states gain increased security through defection,
the transformation that leads to the concert reduces the need to defect
because it provides an alternative route to that goal. If members believe
that the coalition will remain together and that it can keep them secure,
, Ibid., 125-26; Stephen Walt, "Alliance Formation and the Balance of World Power,"
InternationalSecurity 9 (Spring 1985), 3-43, and Walt, The Origins of Alliances (Ithaca, NY:
Cornell University Press, forthcoming).
70 WORLD POLITICS
FROM BALANCE TO CONCERT
they need not pursue unilateral and competitive measures to improve
their own security at the expense of others. Indeed, if states have reason
to believe that safety lies in the health of the concert, increasing their
security by supporting the concert system does not make others less
secure, but has the opposite effect. This incentive was clearly operating
after 1815. Although states did not completely trust the concert to provide
for their security, they did act on the assumption that one of the best
guarantees of their individual interests was the well-being of the established
cooperative arrangements.
Another important value to be gained by defection is a change in the
status quo. After an anti-hegemonic war, this, too, is less attractive than
usual. The winners are likely to be relatively satisfied because they are
able to write the peace terms. For the losers, of course, the situation is
different. After 1815, France was not wildly dissatisfied because the
peace settlement was a moderate one. But that was not the case after
1918, in part because of the increased role ofallied public opinion, which
demanded a harsh peace. For Germany, the resulting incentives to defect
not only made it less willing to join a concert, but also increased tensions
among the Allies because of disagreements on how to deal with the
situation.9
The fact that after 1815 the states had been quite satisfied with the
status quo gave the concert great legitimacy in the eyes of the statesmen.
They saw it as facilitating the achievement of their most important
values. The sorts of cooperative behavior that characterized it therefore
became imbued with more than instrumental worth, and the concert
and its norms took on a moral value, which in turn increased compliance
and self-restraint.
Mechanisms for controlling exploitation. Because of three procedural
norms, states found it more difficult or less advantageous than usual to
try to exploit others under the concert of 1815. The first was the provision
for frequent meetings, which had the further function of increasing
transparency. The Quadruple Alliance, which was signed upon the
defeat of Napoleon, called for periodic conferences of the states' leaders
"for the purpose of consulting upon their common interests, and for the
consideration of the measures which ... shall be considered the most
salutary for the repose and prosperity of Nations, and for the mainteFactors
beyond our structural model have to be taken into account for a complete
explanation of the difference between the British and French positions. On this topic, one
of the earliest discussions still remains unsurpassed: Arnold Wolfers, Britain and France
Between Two Wars (New York: Harcourt, Brace, 1940). For a discussion of the extent to
which France was a revisionist state after 1815, see Roger Bullen, "France and Europe,
1815-48: The Problem of Defeat and Recovery," in Sked (fn. 3), 112-44.
71
WORLD POLITICS
nance of the peace of Europe."2o Because such conferences could be used
to coerce some of the members and to provide the cover of legitimacy
for narrowly national activities, Britain often refused to participate.
(Recall Canning's famous quip: "conferences are useless or dangerous;
useless if we are in agreement, dangerous if we are not."-') But, even
from the English perspective, the conferences were a symbolic affirmation
of the importance of European interests and European unity,
and constituted a barrier to defection. The fact that the states had pledged
to discuss all major issues jointly made it harder for any one of them
to seek outcomes that were unacceptable to others. Changes in the status
quo were not considered legitimate unless and until the great powers
had assented to them, often by holding a conference. Form and substance
are not unrelated: if states are committed to gaining widespread ratification
for crucial actions, they must accept limits on the extent to which
they can hope to make competitive gains.22
Related to the system of conferences was the great powers' habit of
negotiating jointly with third parties (especially Turkey). One purpose
was to increase the pressure on the powers with which they were dealing,
a practice that was especially helpful with a recalcitrant and skilled
target such as Turkey. But the increased ability of each of the great
powers to see that the others were not taking advantage of them and
their concomitant willingness to limit their own potential gains was at
least as important. Paul Schroeder has shown that alliances can be a
tool of control.3 This restriction is not necessarily one-sided: formal
alliances and informal understandings that states will act together can
limit the freedom of action of all the parties. By working together, the
powers ensured that none could steal a march on the others.24
The third way in which great powers limited the potential advantages
of exploiting each other was by formal and mutual self-denying ordi-
2o Quoted in Rene Albrecht-Carrie, ed., The Concert of Europe(New York: Walker, 1968),
32.
Quoted in Temperley (fn. ii), 135.
Thus, in late July 1914, French statesmen were disturbed to learn that Austria and
Germany rejected a role for the other European powers in the dispute between Austria and
Serbia; this indicated a non-cooperative approach and a desire to inflict a settlement that
others would find objectionable. See John Keiger, Franceand the Originsof the First World
War (London: Macmillan, 1984), 153. For a discussion of the relationship between cooperative
processes and cooperative outcomes, see Morton Deutsch, "Fifty Years of Conflict," in Leon
Festinger, ed., Retrospection on SocialPsychology (New York: Oxford University Press, 1980).
23 Schroeder, "Alliances, 1815-1914: Weapons of Power and Tools of Management," in
Klaus Knorr, ed., HistoricalDimensionsof NationalSecurity Problems (Lawrence: University
Press of Kansas, 1976), 227-62.
24 This is not to deny Hinsley's argument that the British realized that their Continental
partners' habit of demanding too extensive collaboration would make the concert impractical.
Only a somewhat looser arrangement, the British felt, would allow the concert to succeed.
See Hinsley (fn. 13), 202-12.
72
FROM BALANCE TO CONCERT
nances. Many of the treaties signed between 1815 and 1854-especially
those involving the relations between great powers and smaller onescontained
a provision by which each of the former forswore any unilateral
advantage. Article V of the treaty by which Britain, France, and
Russia coordinated their efforts to force Turkey to grant independence
to Greece was typical: "The Contracting Powers will not seek, in these
arrangements, any augmentation of territory, any exclusive influence,
or any commercial advantage for their Subjects, which those of every
other Nation may not equally obtain."-5 Similarly, when the powers
guaranteed the independence of Belgium, the treaty registered that
They were unanimously of opinion that the five Powers owe to the interest,
well understood,-to their own union, to the tranquility of Europe, and
to the accomplishment of [Belgian independence], a solemn avowal, and
a striking proof oftheir firm determination not to seek in the arrangements
relative to Belgium, under whatever circumstances they may present themselves,
any augmentation of territory, any exclusive influence,-any isolated
advantages. ... 11
Such words do not totally prevent unregulated competition, and they
were repeated so often that perhaps they became ritualistic. But they
constituted commitments that could not be broken lightly, and they
summarized the spirit of the concert.
C. INCREASED TRANSPARENCY AND TIMELY WARNING
Cooperation is made more likely not only by changes in payoffs, but
also by increases in the states' ability to recognize what others are doingcalled
"transparency" in the literature on regimes. Coupled with the
ability to act on this information, transparency can produce a situation
in which, in effect, the choices of CD and DC are effectively ruled out.
Short periods of defection or exploitation may occur; but if they can be
detected and countered, the only real alternatives are CC and DD.
Inspection and verification are therefore essential even in the absence
of formal agreements.
Concert systems are fairly transparent in part because of a relatively
high level of communication among the actors. By and large, these
communications are also fuller, franker, and less deceptive than those
that characterize normal international politics. Indeed, deception is made
more difficult by the increase in the volume and diversity of information
exchanged.27 Extensive communication makes it easier for states to explain
how and why they are behaving as they are, and to understand
'5 Quoted in Albrecht-Carri6 (fn. 20), 109.
6 Ibid, 69.
27R. V. Jones, Most Secret War (London: Hamish Hamilton, 1978), 23-26.
73
what others are doing. This reduces-although it does not eliminatemisunderstandings
that can cause a breakdown; consequently, states have
greater confidence that others are not planning to exploit them. For
example, many analysts believe that the establishment of the Standing
Consultative Commission (S.C.C.) has been one of the most useful outcomes
of SALT.8
Although a few have argued that this forum has been
used by the Soviets to abet their deceptions, most believe that a number
of potentially disruptive issues were successfully handled through the
confidential and relatively frank exchange of technical information. In
some instances, one side halted or modified activities that constituted,
or could be seen as constituting, a violation of the agreements. In other
cases, the United States or the Soviet Union was persuaded that activities
it viewed as suspicious were actually permissible.
Under some circumstances-and this may have happened after 1815
but apparently did not with the S.C.C.-all sides gain a useful understanding
of the other states' general interests and perspectives. For three
interrelated reasons, defection thus becomes less likely. First, if decision
makers can determine when and whether others are exploiting them,
they will not defect in the mistaken belief that they are responding to
others' defections. Second, if they can not only determine what the others
have done, but why they are doing so, their confidence in their ability
to predict the others' future behavior increases. Third, because they
realize that others have a similar ability to detect and understand their
behavior, they do not fear that others will defect in the mistaken belief
that they themselves have already done so; nor will they defect in the
hope that they can escape detection.
After 1815, statesmen realized that a relatively high level of full and
honest communication could increase the chances of maintaining cooperation.
To this end, they were often willing to forgo the advantages
of surprise, and to inform others of what they planned to do even if
they knew that the latter would not approve of the action. This was
one function of the frequent meetings of the great powers. If each state
had a good idea of the others' plans, all could avoid the common trap
of exaggerating the threat they believed others to be posing. Furthermore,
it could be in a state's interest to give a warning and learn what
the response of others would be if it were to act on its intentions. The
participants could thus look ahead several plays of the game; if the
outcome was worse than mutual cooperation, the first state could decide
11 Robert Buchheim and Dan Caldwell, The US-USSR Standing ConsultativeCommission:
Descriptionand Appraisal (Providence, RI: Center for Foreign Policy Development, Brown
University, May 1983), Working Paper No. 2.
74 WORLD POLITICS
FROM BALANCE TO CONCERT
to refrain from taking its disruptive action. Such arrangements are not
foolproof, of course; not only does the state lose the possibility of taking
others by surprise, but it runs the risk that others will exploit it by
bluffing or by adopting undesired commitments.29
Among states with a relatively high degree of common interests, these
costs are outweighed by the facilitation of cooperation that results. Indeed,
such a system of warnings can be advantageous even among
adversaries. As Van Evera has noted, the pre-World War I German
strategy of faits accomplis, culminating in a posture in which, unbeknownst
to the others, mobilization meant war, deprived both German
and Entente statesmen of the ability to make the timely threats that
might have avoided war.30
While German (and Austrian) statesmen
were preoccupied with the advantages of taking their enemies by surprise,
they overlooked the fact that such tactics also meant that they
would learn too late whether or not their actions would lead to world
war.
In some cases, transparency mainly means determining what specific
actions others are taking. That is not always easy, as the current discussion
of whether the Soviets are violating the SALT agreements reminds
us; but it is usually easier than deciding whether the others'
actions constitute cooperation or defection. The model developed by
Downs and his colleagues shows the problems that misinterpretations
create for a strategy of strict reciprocity. An examination of many cases
reveals that states tend to underestimate the extent to which others are
cooperating, the extent to which their adversaries will perceive that they
have defected, and the extent to which a disinterested observer would
share this judgment.3' These problems do not disappear during the
concert; indeed, their presence is one reason why cooperation tends to
dissipate. But, with a high level of communication, it becomes more
likely that statesmen will gain an understanding of the others' perspectives,
which can help them to interpret the behavior of others and to
design at least some of their own behavior so that it is less likely to be
incorrectly seen as defection.
Transparency can facilitate cooperation only if the information it
provides can be used to avoid or mitigate the consequences of the other's
defection. That is the notion of "timely warning" which is invoked in
'3For instances of deception, especially on Metternich's part, see Schroeder (fn. 3), 46,
82-83, 207, 212, 219.
30 Van Evera (fn. 8).
3' See Downs and others, "Arms Races and Cooperation," pp. 118-46 of this collection;
Robert Jervis, Perception and Misperception in InternationalPolitics (Princeton: Princeton
University Press, 1976), 67-83, 354-55.
75
arms control arrangements like the Nuclear Non-Proliferation Treaty.
The verification provisions of such agreements cannot prevent states
from taking the forbidden actions, but they can let others know that a
violation is occurring, so that they can take effective countermeasures.
The arrangements of the concert cannot completely meet this requirement
but, by providing guidelines for behavior, they help statesmen
determine whether or not others are cooperating. Living up to agreements
is a somewhat artificial definition of cooperation, but it is a useful
one, especially when compared to the even vaguer alternative of trying
to determine whether the other's actions have the effect-or were motivated
by the intention-of doing harm. Furthermore, agreements provide
at least a basis for a common understanding, even though there is
almost always room to argue about what they mean and what constitutes
behaving in accord with them. States thus have a bit more confidence
that they will be able to determine relatively quickly whether others are
defecting, which gives them more time to react. Cooperation would also
be facilitated if states were able to react in ways that would protect them
from defections without simultaneously menacing others-in other
words, if a strictly defensive response was effective. Although I argued
earlier that defensive strategies were often possible under the concert,
many contextual factors that cannot be related to the presence or absence
of the concert are also important.
D. CHANGED ESTIMATES OF THE BEHAVIOR OF OTHERS
Whether or not a statesman will cooperate is strongly influenced by
his beliefs about whether others will cooperate. Assuming that he wishes
to maintain good relations and does not think he can defect without
triggering retaliation, he will do what he thinks others will do-that
is, defect if he thinks they will defect and cooperate if he thinks they
will cooperate. The changes we have been discussing widen the chances
of cooperation by increasing the decision makers' estimates of the likelihood
that others will cooperate. The experience of fighting a potential
hegemon affects the payoffs of others in the same way that it affects the
state's own preferences. Each decision maker knows that all the reasons
why his state is likely to seek cooperative solutions also apply to others
in the system. Furthermore, he knows that the others realize that he
prefers cooperation, thus again reducing the danger that each side will
defect in the fear that the other will do so. Thus, there is the possibility
of a benign circle and a self-fulfilling prophecy of cooperation.
Expectations about the behavior of others are also important in a
76 WORLD POLITICS
FROM BALANCE TO CONCERT
different way. Although a state will cooperate only if it thinks the other
will, it may defect if it thinks the other has no choice but to cooperate.
In the absence of the constraint imposed by the other's threat to reply
in kind, the state will be strongly tempted to cheat and to exploit the
other. For example, the United States probably did not encourage Soviet
restraint when it reduced its spending on strategic weapons between the
mid-196os and the mid-1970s. Not only was the U.S. far ahead of the
U.S.S.R. on most measures of strategic power during most of this era,
but the Soviets probably believed that Washington had no choice but
to hold down its deployments-first because of the costs of the war in
Vietnam, and later because of public opposition. Thus they saw no reason
to attribute the American behavior to a commitment to mutual restraint
or to believe that American behavior would depend on their own.
To the extent that the transformation we have been discussing has
any systematic effect on this dimension, it may be to make cooperation
less likely. States in the concert system may believe that their partners
have to cooperate, that the constraints against going off on their own
are so strong that even if the state engages in occasional exploitation,
the others will not respond in kind. One reason that good relations
between Britain and France did not withstand the strain imposed by a
serious dispute over influence in Spain in the late 1840s was that the
French Prime Minister assumed that the British elite was not "prepared
to contemplate a permanent rupture ... and that if he took independent
action in Spain he would have at most a temporary coolness to contend
with." Many Englishmen shared the view of their ambassador to Spain
that "the entente [was] strong enough to weather a temporary storm and
... that the French would soon reconcile themselves to the loss of
influence in Spain."32 Similarly, Donald Kagan sees the alliance between
Athens and Sparta as part of the reason why the peace treaty between
the two states brought only a temporary respite in the Peloponnesian
Wars: "It allowed Sparta to continue to ignore its obligations under the
peace treaty" in the belief that Athens was unconditionally committed
to keeping the peace.33
The perception that others are cooperating not
because they think the state will cooperate but because they have no
choice is a common one, and the knowledge that others are strongly
motivated to cooperate will reinforce this belief. In showing others that
defection is possible, the state must be careful not to lead them to infer
3'Bullen (fn. I1), 81, 93; also see Craig (fn. 1), 257.
33 Donald Kagan, The Peace of Nicias and the Sicilian Expedition (Ithaca, NY: Cornell
University Press, 1981), 30.
77
that it is determined to defect no matter what they do. It is difficult but
necessary to establish relations that are conditional, and to convince the
other side that they will continue to be so.
III. CONCLUSIONS
Anarchy and the security dilemma do not prevent a relatively high
level of cooperation in the form of a concert system. Such systems are
rare, however. Usually, a balance of power prevails. The epitome of the
operation of the balance of power is a war fought against a potential
hegemon. Ironically, such a conflict undermines two of the crucial assumptions
that maintain the system: the lack of alliance handicaps and
the availability of war as a normal instrument of policy. The transformation
of a balance of power into a concert confirms the theoretical
arguments about the conditions that facilitate and inhibit cooperation
in anarchy. After wars against potential hegemons, the incentives for
the former allies to maintain good relations are unusually high. Even
if mutual cooperation is the states' second choice and they would all
prefer a situation in which they themselves defected while the others
cooperated, the gap between the value of their first and second choices
is relatively small. What they would lose if the system broke down into
mutual defection and competition, furthermore, is very great because
such a configuration could lead to the renewed threat from the potential
hegemon, or to a very costly war. Because these outcomes are extremely
bad, it is rational for states to run some risk of being exploited in order
to avoid them.
Under the concert, not only do the payoffs from two symmetrical
outcomes (that is, mutual cooperation and mutual defection) encourage
cooperation, but so do the two asymmetrical ones. A state may defect
either because it is attracted by the possibility of being able to do so
while the others continue to cooperate, or because it is repelled by the
fear that its cooperation will be met by the defection of others. The
latter danger is reduced both by the state's ability to observe what others
are doing and by the nascent collective security system that provides
some expectation of support from third parties and so reduces the state's
vulnerability to defection. The other side of this coin is that the gains
a state can expect to make by defecting are smaller under the concert
than they are under the balance of power. If there is a concert, others
will be quicker to oppose the state if it defects. Even if its efforts to
defect succeed in the short run, they will be self-defeating if they result
in the destruction of the system of cooperation. It is also important that
78 WORLD POLITICS
FROM BALANCE TO CONCERT 79
all states realize that these incentives operate for others as well as for
themselves, leading to the possibility of sustained mutual cooperation.
The chance of bringing this theoretical possibility to fruition is increased
by the relatively high level of communication among the states and the
concomitantly increased ability of each to determine how others have
acted and are likely to act in the future. None of this means that
cooperation is easy or automatic, but it does show that when balanceof-power
assumptions no longer hold, the incentives shift so that anarchy
and the security dilemma no longer provide a powerful stimulus to
undesired conflict.