Almost 80 years after Leon Trotsky founded the Fourth International, there are now Trotskyist organizations in 57 countries, including most of Western Europe and Latin America. Yet no Trotskyist group has ever led a revolution or built an enduring mass, political party. Contemporary Trotskyism looks in detail at the influence, resilience and weaknesses of the British Trotskyist movement, from the 1970s to the present day. The book argues that to understand and explain the development, resilience and influence of Trotskyist groups, we need to analyse them as bodies that comprise elements of three types of organization: the political party, the sect and the social movement. It is the properties of these three facets of organization and the interplay between them that gives rise to the most characteristic features of the Trotskyist movement: frenetic activity, rampant divisions, inter-organizational hostility, authoritarian and charismatic leadership, high membership turnover and