Harry Cassidy (1900–1951) was a Canadian academic, social reformer, civil servant and, briefly, a politician. Cassidy was born on January 8, 1900, to parents Herbert Cassidy and Maria Morris Cassidy, transplanted Maritimers who ran a general store. In 1916 Cassidy enlisted underage in the army, spending the next three years in uniform and returning to Canada in the spring of 1919. Harry Cassidy was a pioneer in the field of social work. He was the founding dean of the School of Social Welfare at University of California, Berkeley in the early 1940s before resigning to work for the United Nations Relief and Rehabilitation Administration. He subsequently became dean of the School of Social Work at the University of Toronto. He went on to hold distinguished posts in public service, and in the