Islamism constitutes a new variant of the communitarian challenge to a liberal international order. But is it a viable political project in a world where human rights and international humanitarian principles have become so pervasive? What are the consequences of the global diffusion of the norms of international society for Islamist groups that (pro)claim a self-referential Muslim identity; attempt to shield their communities from allegedly alien moral conceptions; and assert the exclusive validity of supposedly immutable Islamic principles