He is best known for his books and articles on modern art history and criticism.
Since 1987, he has taught at the University of British Columbia, Vancouver, where he is a Faculty Associate of the Peter Wall Institute for Advanced Studies and held the Brenda & David McLean Chair in Canadian Studies from July 1, 2008, to June 30, 2011.
He was appointed a Fellow of the Royal Society of Canada in 2009, and received an honorary doctorate from the Trinity College at the University of Toronto in 2011.