THE EXTREME RIGHT 181 eral framework, we stress the ethnic elements ofthe discourse and mobilization of the extreme right-a collective actor that conveys an ethnoculrural conception of national identity, emphasizing cultural difference as a major barrier toward integration and societal cohesion, and that opposes the idea of the nation as a political and civic community (Koopmans and Statham 1999b). Of course, this approach does not exhaust the various ideological and discursive elements of this actor and does not do its full complexity justice. Yet, it focuses on the distinctive characteristic of the extreme right with respect to the political field of immigration and ethnic relations. By doing so, this allows us to link the claims made by extreme-right actors with the prevailing configurations of citizenship. The success of extreme-right parties varies strongly across countries. While, for example, the French Front National gained the support of 15 percent of the electorate in 1997 and triumphed over the Socialist Party in the first round of the presidential elections in 2002, the British National Party has remained steadfastly at the political margins. Previous work has tended to overlook cross-national differences in favor of a focus on the conditions that have facilitated the emergence or breakthrough of extreme-right parties. In addition, it has tended to focus on parties and electoral strength, stressing two main sets offactors: demand-side and supply-side. The former refers to the conditions that have led to the creation of a social and cultural reservoir to be exploited by far-right political organizations, such as value change and structural cleavages related to the modernization process (e.g., Betz 1993; Flanagan 1987; Ignazi 1992; Minkenberg 1992). Supply-side factors include political and institutional aspects, such as the structure of the electoral system, the responses ofestablished actors, and the dynamics of party alignment, demarcation, and competition (e.g., Betz 1993; Kitschelt 1995; Kriesi 1999; Koopmans 1996a; Schain 1987; Thranhardt 1995), that provide the extreme right with a political niche to be exploited. With regard to explanations for the rise and mobilization of extraparliamentary forms ofthe extreme right (e.g., racist and xenophobic violence perpetrated by skinheads or other groups of apparently disaffected youngsters), there is relatively little systematic research. To find a theoretical framework to explain this form of right-wing extremism, we must resort to the social movement literature. There we find two competing explanations: one focusing on grievances and ethnic competition, the other on opportunities and institutional frameworks (Koopmans 1996a). Grievance theories see the cause of extreme-right violence as discontent with respect to the main target of this collective actor, i.e., foreigners, migrants, and asylum seekers, and as a response to growing pressures stemming from new immigration and its