Samuel Delbert Clark OC FRSC (1910–2003), known as S. D. Clark or Del Clark, was a Canadian sociologist. Born on 24 February 1910 in Lloydminster, Alberta, Clark grew up near Streamstown, Alberta. He received a Bachelor of Arts degree in political science and history in 1930 and a Master of Arts degree in 1931 from the University of Saskatchewan. His master's thesis was titled Settlement in Saskatchewan with Special Reference to Dry Farming. From 1932 to 1933, he studied at the London School of Economics. In 1935, he received a Master of Arts degree from McGill University and a Doctor of Philosophy degree in 1938 from the University of Toronto. His 1937 doctoral thesis was titled The Canadian Manufacturers' Association: A Political and Social Study. In 1943, he was awarded a fellowship fro