Appointment as a Tanner lecturer is in recognition for uncommon achievement and outstanding abilities in the field of human values. The lecturers themselves come from the fields of philosophy, religion, the humanities, the sciences, the creative arts, and learned professions, or from leadership in public or private affairs. The lectureships are international and intercultural and transcend ethnic, national, religious, and ideological distinctions. Past Tanner lecturers at Stanford include: Jared Diamond, Dorothy Allison, Paul Krugman, Mary Robinson, Harry Frankfurt, Avishai Margalit, David Brion Davis, and Glenn Loury.