This is a timely study of the international relations of Islamic states, dealing both with the evolving theory of pan-Islamism from classical to post-caliphal times and the foreign-policy practice of contemporary states, especially Saudi Arabia, Iran and Pakistan, from the colonial period to the global aftermath of September 11. With a concise but analytic style, the book engages one-by-one with the questions of political theory, political geography and political sociology as they relate to international Islam. Its primary empirical investigation is centred on the Organization of the Islamic Conference (OIC), a powerful pan-Islamic regime, sometimes referred to as the 'Muslim United Nations'. In its theoretical deliberations on Islam and the postmodern condition, the book reconstructs contemporary understandings of how religious ideas and identities influence international politics in the Islamic world.