Since its founding in 1945, the Jordanian Muslim Brotherhood has enjoyed decades of almost continuous parliamentary presence and state acceptance in Jordan, participating in elections, organising events and even establishing a hospital. In this detailed account of the Muslim Brotherhood's ideological and behavioural development in Jordan, Joas Wagemakers focusses on the group's long history and complex relationship with the state, its parliament and society. It shows how age-old concepts derived from classical Islam and the writings of global Islamist scholars have been used and reused by modern-day Jordanian Islamists to shape their beliefs in the context of the present-day nation-state. Far from its reputation as a two-faced global conspiracy bent on conquering the West, the Muslim Brotherhood is a deeply divided group that has nevertheless maintained a fascinating internal ideological consistency in its use of similar religious concepts. As such, it is part of, and continues to build on, trends in Muslim thought that go back hundreds of years.