Frank Underhill (1885-1971) was a Canadian historian, social critic, and political thinker. He studied at the University of Toronto and Oxford University. He taught at the University of Saskatchewan from 1914 to 1927, and from 1927 to 1995 he was a professor of History at the University of Toronto. He played a notable part in the political life of Canada as a founder of the Cooperative Commonwealth Federation and as a prominent member of the League for Social Reconstruction. His publications include In Search of Canadian Liberalism, a volume of essays for which he received the Governor General's Literary Award for Nonfiction in 1961. In 1967, he was made an Officer of the Order of Canada.