Stirring language and appeals to collective action were integral to the battles fought to defend empires and to destroy them. These wars of words used rhetoric to make their case. That rhetoric is the subject of this collection of essays exploring the arguments fought over empire in a wide variety of geographic, political, social and cultural contexts. Why did imperialist language remain so pervasive in Britain, France and elsewhere throughout much of the twentieth century? What rhetorical devices did political leaders, administrators, investors and lobbyists use to justify colonial domination before domestic and foreign audiences? How far did their colonial opponents mobilize a different rhetoric of rights and freedoms to challenge them? These questions are at the heart of this collection. Essays range from Theodore Roosevelt’s articulation of American imperialism in the early 1900s to the rhetorical battles surrounding European decolonization in the late twentieth century.