1. In the 19th century, European powers like Britain believed in their racial and cultural superiority, which helped justify their colonization of other regions and peoples.
2. Geopolitical theories also influenced European colonialism, such as the idea that whoever controlled the Eurasian heartland would dominate the world. Britain's naval power and industrial strength allowed it to become the first major global superpower in the 19th century.
3. Christianity and social Darwinism were used to argue that colonization was necessary to civilize inferior races and improve the gene pool through domination of stronger over weaker peoples. The British Empire demonstrated how colonial domination could give a nation great power and resources to fuel further industrial development.