Western Europe valued imperialism. For example, Great Britain was known for the numerous colonies that they had. There is a quote that states, "The Sun never sets on Great Britain" meaning that they had so many colonies around the world that the Sun never set on them. In addition, countries such as France and Spain also imperialized especially in the New Worl. However, Eastern Europe was always less developed than Western Europe so they didn't have the power to colonize countries. I hope this help! Good luck!