Opening ParagraphThis paper had its genesis in the recent thoughtful and stimulating article by Robin Horton, on African conversion; the core of his argument is summarized below. Horton's evidence is chiefly drawn from Christian African experience, though he seeks to generalize from it for both Islam and Christianity. My specific purpose here is to look more closely at the phenomenon of Muslim conversion, and to see what light this may throw on Horton's argument. In particular, he has, I think, over-estimated the survival, admittedly in considerably developed forms, of original African elements of religion; and more important, has under-estimated the willingness and ability of Africans to make even rigorous Islam and Christianity their own. My other, general, purpose is to suggest that such Muslim/Christian comparisons may considerably enlarge our perspectives upon black Africa. The comparative approach is extended further, I hope not rashly, with brief considerations of conversion in the ancient world, and of the effects of literacy.