Some of mankind's earliest advancements emerged in Africa, despite lack of cultural diffusion, including language, medicine, architecture, and mathematics
Factors other than colonialism and climate that may have contributed to slower development in some African countries include landlocked geography, lack of deep ports, and corruption
Desertification in the Sahel and Malawi is caused by climate change (more droughts, higher temperatures, unpredictable rainfall) and population pressures (over-cultivation, overgrazing, deforestation)