Henry Sidgwick was one of the great intellectual figures of nineteenth-century Britain. He was first and foremost a great moral philosopher, whose masterwork The Methods of Ethics is still widely studied today. He also wrote on economics, politics, education and literature. He was deeply involved in the founding of the first college for women at the University of Cambridge. He was also much concerned with the sexual politics of his close friend John Addington Symonds, a pioneer of gay studies. Through his famous student, G. E. Moore, a direct line can be traced from Sidgwick and his circle to the Bloomsbury group. Bart Schultz has written a magisterial overview of this great Victorian sage. This biography will be eagerly sought out by readers interested in philosophy, Victorian literary studies, the history of ideas, the history of psychology and gender and gay studies.