Suddenly they were back in the news, if briefly: young people marching with placards and upraised fists to protest U.S. military intervention in El Salvador. Naturally the demonstrations stirred memories of the Viet Nam War. But they were also a striking reminder of something else: how little American youth has made its presence felt in recent years.
Compared with their predecessors, Americans in the pre-adult age brackets have, for the past ten years, been nearly invisible. Those predecessors, to be sure, were something special. They were the most active and activist generation of young...