imperialism
Historiography of the British Empire
Imperialism, the Highest Stage of Capitalism 1917 book by Lenin
International relations of the Great Powers (1814–1919)
International relations, 1648–1814
List of empires
List of largest empires
Political history of the world
Scramble for Africa, in late 19th century
Analysis of Western European colonialism and colonization
14 Points esp. V and XII