In the twenty-odd years since the declaration of a state of emergency in Kenya in October 1952, the analysis of the phenomenon known as ‘Mau Mau’ has undergone a fundamental revision. The initial interpretation, advanced by the colonial authorities and their apologists and by a few (mostly British) scholars, explained ‘Mau Mau’ as a fanatic, atavistic, savage religious cult consciously created and manipulated by a group of unscrupulous, power-hungry leaders. It was said to be rooted in a mass psychosis affecting an unstable tribe freed from the anchoring constraints of tradition. It was also said to have had no direct links to socio-economic conditions in the colony or to the policies of the Kenya government. This interpretation, popularized by a large and sensational journalistic literature, went virtually unchallenged for more than a decade. During this period ‘Mau Mau’ and its antecedents were largely ignored by social scientists. As late as 1965, Gilbert Kushner could report that a search of major anthropological journals revealed, at best, only peripheral mention of Mau Mau. Where ‘Mau Mau’ was explicitly considered, the basic premise of the official explanation was generally accepted, and the phenomenon was treated as a nativistic cult or revitalization movement.