William Ritchie Sorley, FBA (/ˈsɔːrli/; 4 November 1855 – 28 July 1935), usually cited as W. R. Sorley, was a Scottish philosopher. A Gifford Lecturer, he was one of the British Idealist school of thinkers, with interests in ethics. He was opposed to women being admitted as students to the University of Cambridge.