Alfred attended Columbia University, where he was a pre-law student and a member of the Peithologian Society (a debating and literary club) and the Boar's Head Society. He began to show an interest in publishing during his senior year, becoming advertising manager of an undergraduate magazine. His interest in publishing was allegedly fostered by a correspondence with British author John Galsworthy. Galsworthy was the subject of Knopf's senior thesis and after visiting Galsworthy in England, Knopf gave up his plans for a law career, and upon his return went into publishing.