The baffling history of mankind is full of obvious turning points and significant events: battles won, treaties signed, rulers elected or deposed, and now, seemingly, planets conquered. Equally important are the great groundswells of popular movements that affect the minds and values of a generation or more, not all of which can be neatly tied to a time and place. Looking back upon the America of the '60s, future historians may well search for the meaning of one such movement. It drew the public's notice on the...

