This edition of Richard H. Pells's classic work of American intellectual history includes a new preface. ''The best explanation I have seen of why Marxism attracted so many intelligent people forty years ago.'' -- Newsweek ''A rich, satisfying, well-written book. . . . It is not only an analysis but also an astute critical assessment of how the intellectuals of the thirties understood and tried to change their world, and what it did to them.'' -- John Higham