West Africa : the material and technological foundations / by Gloria T. Emeagwali -- The boundaries of African civilizations / by David Wilkinson -- Ancient Africa : the Europocentric/Afrocentric debate / by Fitzroy A. Baptiste -- Ideology versus the tyranny of paradigm : historians and the impact of the Atlantic slave trade on African societies / by Joseph E. Inikori -- African philosophy / by Korsi Dogbe.