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Imperialism - Wikipedia
Imperialism | Definition, History, Examples, & Facts | Britannica
Imperialism Definition and Historical Perspective - ThoughtCo
Imperialism and its history | Britannica
Imperialism Definition & Meaning - Merriam-Webster
New Imperialism | Definition, History, & Causes | Britannica
From Imperialism to Postcolonialism: Key Concepts
"Expansion Was Everything" - Facing History and Ourselves
Imperialism: Lessons From History - Imprimis
Imperialism - New World Encyclopedia