Why wasn't Islam the rallying point and battle cry of the anti-colonial movement in the Sudan? Why did the mainstream political parties and the first military regime maintain the 'secular' political structures of the colonial state? Why did the influential parties opt for an 'Islamic constitution' in the 1960s? Why did Nimeiry's regime change is course? This work attempts to answer these and related questions. Three key issues are addressed within the framework of the relationship between Islam, society and politics: the manifestation of Islam in the particular context of Sudanese society; the politicisation / repoliticisation of Islam and the Islamicisation of politics; and the mechanisms that influence the rise of a specific Islamicist force or enhance calls for Islamicisation.