Low voter turnout is a serious problem in American politics today, but it is not a new one. Its roots lay in the 1920s when, for the first time in nearly a century, a majority of eligible Americans did not bother to cast ballots in a presidential election. Stunned by this civic failure so soon after a world war to "make the world safe for democracy," reforming women and business men launched massive campaigns to "Get Out the Vote." By 1928, they...