Leonard Wayne Sumner FRSC (born 18 May 1941)[1] is a Canadian philosopher notable for his work on normative and applied ethics, political philosophy, and the philosophy of law.
[2] Educated at the University of Toronto Schools, Sumner received his bachelor's degree from the University of Toronto in 1962 and his doctoral degree from Princeton University in 1965, with a thesis supervised by Stuart Hampshire and Joel Feinberg.
[4] In 1990 he was elected a fellow of the Royal Society of Canada.
[5] In 2009 he was awarded the Molson Prize by the Canada Council for the Arts.
[6] Sumner is the author of four books, including Welfare, Happiness and Ethics.