Antiwar and countercultural activism by millions of young people of every backgound turned campuses and cities into both battle grounds and zones of social and cultural innovation while helping to bring down two presidents and rearranging both the Democratic and Republican Parties. The impact of these movements registered widely: in the military which had to be redesigned to operate without conscription; in mass media which scrambled to recapture a generation that had discovered underground newspapers; and especially in the new ways that many Americans would from then on view their nation‘s institutions and role in the world.