Colonial Africa and African Africa. Africa partitioned -- imperialism -- The racial issue -- Africa renascent. -- Building African unity. African unity -- the impulse -- Unity versus separatism -- Unity -- "the white tribe"? -- Progress toward unity. -- The African economies and the outside world. An overview of African economies -- "African socialism" -- Free Africa and the free world. -- Africa in world politics. Neutralism -- Neutralism : the case of the African trade unions -- Africa and the United States -- The Katanga crisis -- The resolution of the Katanga crisis.