To the Undergraduates of Humanities 304 Who in 1956, 1957, and 1958 responded with charm and forbearance to the presentation of this history by the spoken word, and who by discussion brought about its evolution to the present form,

This reduction of our dialogue to a book is dedicated—in particular appreciation of the engaging complements of curiosity and skepticism which stimulated even while restraining the author’s more immoderate enthusiasms.

Princeton, June 1959