Abstract
The foundation and electoral success of a new party can be attributed mainly to three factors: (1) its political project, which should address problems considered urgent by substantial sections of the electorate; (2) its resources: members, money, management and mass media exposure; and (3) the political opportunity structure: positions of other relevant parties as well as institutional, socio-economic and cultural conditions. These factors, however, affect different types of new parties differently. `Prophetic' parties, which articulate a new ideology, are successful if the ideology can be linked to latent or `subterranean' traditions, provided they can mobilize sufficient resources. `Purifiers', which refer to an ideology that has been betrayed or diluted by established parties, and prolocutors, which represent interests neglected by established parties, depend mainly on the political opportunity structure and specifically the position of established parties with respect to salient cleavages and issues, as well as on the electoral system.
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