Stephen J. Gould declared G. Evelyn Hutchinson the most important ecologist of the twentieth century. E. O. Wilson pronounced him "one of the few scientists who could unabashedly be called a genius." In this fascinating book, Nancy G. Slack presents for the first time the full life story of this brilliant scientist who was also a master teacher, a polymath, and a delightful friend and correspondent. Based on full access to Hutchinson's archives and extensive interviews with him and many who knew him, the author evaluates his important contributions to modern ecology and his profound influence as a mentor. Filled with information available nowhere else, the book draws a vibrant portrait of an original scientific thinker who was also a man of remarkable personal appeal.