Chapter Outline
More than eleven million square miles in size, Africa is Earth’s second-largest continent and home to a huge diversity of geographies and climates. Its environments range from arid desertscapes with sand dunes hundreds of feet high to lush tropical rainforests blanketed by impenetrably dense foliage. Its peoples have adapted to these environments over millennia (Figure 9.1), and their achievements were great, but extreme climates wreak havoc on the historical record. Ancient Africa was nevertheless a marvelous mosaic of unique civilizations, and the more historians work at uncovering their pasts, the clearer our picture will be of their accomplishments and contributions to world history.