Precolonial Africa was far more thinly populated than Europe due both to the inability of its pastoral and primitive agricultural economies to support a dense human population and to the much greater prevalence of disease. The high natural fertility of Africans was an evolutionary response to the precariousness of human life in a disease-ridden environment.
European colonization gradually introduced the fruits of the scientific and industrial revolutions to the continent. These had already produced something of a population explosion in Europe itself, but 1) Europeans have lower natural fertility than Africans, and 2) they lowered it still farther in response to the industrial revolution, a shift in fertility known as “the demographic transition.” The modern world offered a higher standard of living for the white man in part because his newfound resources did not all go to supporting a larger population. This shift was made possible by European self-control and the ability to plan for the future.
Black Africa has never experienced a demographic transition. The effects of Western technology applied to this naturally high-fertility population have been a far more intense and dramatic population explosion that the West ever experienced, and it continues to this day. For example, In 1900, when it was placed under formal British administration, Nigeria had only 16 million people; yet it was by far the most populous African colony. Its population is now 186 million, a more than eleven-fold increase.
Analogous population explosions have been recorded in the animal world among species whose natural predators have been eliminated. They did not turn out well. The most famous example is the spectacular increase in the deer population of Arizona’s Kaibab Plateau, following the “humanitarian” decisions in 1906 to ban hunting and to eliminate all deer predators. By the mid-1920s, the herd had swollen from a few thousand to 100,000, far outstripping the carrying capacity of the land. Soon the hungry animals were eating every last plant on the plateau down to its roots, and massive starvation set in. Food sources were so completely exhausted that it was many years before the plateau could once again support even the modest herds that had lived there before their predators were removed. The final catastrophe was greater than it might otherwise have been because proposals to cull the herd in time were rejected as cruel; the result was a far slower and more agonizing death for a larger number of animals. It was a case of humanitarian sentiment defeating its own purposes.
(American Renaissance, October 27, 2017).