Recent electoral success of the Freedom Party in Austria, List Pim Fortuyn in The Netherlands, the People's Party in Denmark and the National Front in France have demonstrated the appeal of parties that challenge the political establishment. This book seeks to explain why these parties have achieved a political breakthrough, but unlike other studies in the area does not concentrate on only one type of party. Instead it attempts to determine preconditions for the success of anti-political establishment parties in general, avoiding any time specific or ideology specific explanations.