Imperialism: Imperialism refers to a policy or practice where one country extends its power over other regions through colonization or military force for economic or political gain.
Decolonization: Decolonization is the process by which former colonies gain independence from their colonizers. This often involves struggles for self-determination and can lead to significant social and political changes.
Mercantilism: Mercantilism is an economic system that was prevalent during the colonial era. It advocates for a country to export more than it imports in order to accumulate wealth and power.