Professor Armitage is the author or editor of fifteen books, among them The Ideological Origins of the British Empire (2000), which won the Longman/History Today Book of the Year Award, The Declaration of Independence: A Global History (2007), which was chosen as a Times Literary Supplement Book of the Year, Foundations of Modern International Thought (2013) and The History Manifesto (co-auth., 2014), a New Statesman Book of the Year. His latest book, Civil War: A History in Ideas, will appear in the autumn of 2016.