Terence Ranger & Olufemi Vaughan 
Legitimacy and the State in Twentieth-Century Africa [PDF ebook] 

This book takes as its theme the ways in which governments legitimate their rule, both to themselves and to their subjects. Its introduction explores legitimacy and pre-colonial states, but the three sections of the book deal with colonial legitimacy, the question of legitimation in the transition from colonialism to majority rule, and the contemporary debate about accountability.