<p>Backing a major-party candidate for president would have been anathema to Michael Klonsky 40 summers ago, when the organization he led, Students for a Democratic Society, urged young people to spurn elections. “By ’68, our line was ‘Vote in the Streets,’” Klonsky told me last spring. “We thought we had to fight with Eugene McCarthy and those people.” In August 1968, protesters clashed with police outside the Democratic Party’s national convention in Chicago—but far from being political innocents who took to the streets to protest Vietnam War hawks’ capture of the Democratic presidential nomination, many of them never supported antiwar candidates McCarthy and Robert Kennedy. “Those of us who have been in the streets for the past five days didn’t give a flying fuck whether McCarthy would win or lose,” SDS declared in posters around Chicago, “and now that he’s lost, still don’t.” On the eve of the general election of that year—in which less than 1 percentage point would separate the popular-vote totals of Richard Nixon and Hubert Humphrey—Klonsky’s SDS bluntly proclaimed: “The elections don’t mean shit.”</p>