About Leonard Sumner Leonard W. Sumner is a professor in the Department of Philosophy at the University of Toronto. Books by Leonard Sumner The Hateful and the Obscene Studies in the Limits of Free Expression by (author) Leonard Sumner Philosophical Perspectives on Bioethics edited by Joseph Boyle & Leonard Sumner Pragmatism and Purpose Essays Presented to Thomas A. Goudge edited by Leonard Sumner, John G. Slater & Fred Wilson
