How George Herbert Mead’s book came to be published tells something about the author’s unusual stature as a professor. The book’s contents primarily represent the careful editing of several sets of notes taken by appreciative students attending Mead’s lectures on social psychology at the University of Chicago, especially those given in 1927 and 1930; other manuscript materials also appear in the book. For more than thirty years, Mead taught at the University of Chicago, exerting a powerful scholarly influence on students, colleagues, and professional acquaintances. His written contributions during his lifetime were confined to articles and reviews for learned journals. Nevertheless, as a result of the devotion of some of those he influenced, Mead has left to the learned world four published books, all of which appeared after his death. The other three books are The Philosophy of the Present (1932), Movements of Thought in the Nineteenth Century (1936), and The Philosophy of the Act (1938).