Er wurde auch gewählt, um die British Academy und der American Academy of Arts and Sciences. Case Western Reserve (1969), Princeton (1985) und der State University of New York in Buffalo (1990) verlieh ihm Ehrentitel. ###>He was also elected to the British Academy, and the American Academy of Arts and Sciences . Case Western Reserve (1969), Princeton (1985) and the State University of New York at Buffalo (1990) awarded him honorary degrees.