The distribution of the fossils around the globe, is one of the biggest evidence about the continental drift theory. This is because there are lots of fossils that are belonging to the same species, but are found on different continents.
All of the organisms are unique, and even with parallel evolution, the organisms can not become identical, even though they look similar. In other words, the same species can not be found on places that are isolated from one another, thus it is a nice proof that the continents in the past were moving.
Social Darwinism was the idea in which Europeans thought they were racially superior to other races. This encourage them to treat native Africans poorly as if they were second class. It also prompted their imperialism in the scramble for Africa.
