Informative essays on various aspects of left-wing movements, with differing prescriptions on how Western powers should react to possible communist participation in government. Griffith argues against any support of such a coalition; Richard Löwenthal, whose credentials of opposition to communism are just as impeccable, argues for a more flexible approach. A timely collection, even if the French Communists' rigid anti-socialist, pro-Soviet stand has made a left-wing victory there seem entirely implausible now.