Party movements can be described as political organizations that both participate in the electoral process and have social movement qualities. They appear frequently in both Canada and the United States. Many of these movements face huge organizational problems, and yet they display remarkable resilience, signaling both continuing political dissatisfactions as well as possibilities for changing political outcomes. This book demonstrates how organizational theory can be useful for understanding party movements, and also expands on the idea of continuity, contributing new ways of thinking about how organizations change and survive in the face of recurring dilemmas. This look inside party movements, at the organizational problems they face and the strategies employed to deal with them, represents a new way of accounting for their history that contrasts with perspectives focusing solely on external conditions.