Henry Sidgwick (/ˈsɪdʒwɪk/; 31 May 1838 – 28 August 1900) was an English utilitarian philosopher and economist. He was the Knightbridge Professor of Moral Philosophy at the University of Cambridge from 1883 until his death, and is best known in philosophy for his utilitarian treatise The Methods of Ethics. He was one of the founders and first president of the Society for Psychical Research and a member of the Metaphysical Society and promoted the higher education of women. His work in economics has also had a lasting influence. In 1875 he co-founded Newnham College, a women-only constituent college of the University of Cambridge. It was the second Cambridge college to admit women, after Girton College. Newnham College's co-founder was Millicent Garrett Fawcett. In 1856 Sidgwick joined the