Imperialism
The main definition of imperialism is the effect that a powerful country or group of countries has in changing or influencing the way people live in other, poorer countries. But to simplify that imperialism basically means when one dominating country takes over another.
This map shows some of the many countries that were imperialized by Europe and America, and also tells you why they were imperialized.
This quick video will help your understanding of Imperialism from a group of smart historians, the Crash Course YouTube channel.This video talks about imperialism itself in many ways, such as who was involved, why people did it and what the world was like around it.