Book excerpt: Africa has a vibrant past. It emerges from this book as the proud possessor of a vast and highly complicated interweaving of peoples and cultures, practising an enormous diversity of economic and social strategies in an 2xtraordinary range of environmental situations. At long last the archaeology of Africa has revealed enough of Africa's unwritten past to confound preconceptions about this continent and to upset the picture inferred from historic written records. Without an understanding of its past complexities, it is impossible to grasp Africa's present, let alone its future.