ISLAMIC MOBILIZATION:

This article examines the emergence and growth of the Muslim Brotherhood in Egypt from the 1930s through the 1950s. It begins by outlining and empirically evaluating possible explanations for the organization's growth based on (1) theories of political Islam and (2) the concept of political opportunity structure in social movement theory. An extension of these approaches is suggested based on data from organizational documents and declassified U.S. State Department files from the period. The successful mobilization of the Muslim Brotherhood was possible because of the way in which its Islamic message was tied to its organizational structure, activities, and strategies and the everyday lives of Egyptians. The analysis suggests that ideas are integrated into social movements in more ways than the concept of framing allows. It also expands our understanding of how organizations can arise in highly repressive environments.