The most historic Academy Awards ceremony might well be the one in 1968. The Oscars that year — for the best picture of 1967 — were, in their way, as revealing about the changes sweeping America as the Chicago Democratic Convention. The nominees were two radical takes on American culture, Bonnie and Clyde and The Graduate, as well as Guess Who’s Coming to Dinner, In the Heat of the Night and Doctor Dolittle. “Suddenly, the 1968 Oscar race had become a referendum on something more than the quality of the five movies,” writes Mark Harris in his excellent Pictures at a Revolution: Five Movies and the Birth of the New Hollywood. “Bonnie and Clyde and The Graduate … were instantly understood by young moviegoers as mirrors on the counterculture, even if they weren’t quite products of it.” Against Bonnie and Clyde and The Graduate were two movies starring Hollywood’s one true black movie star, Sidney Poitier, that tried to address the nation’s racial unrest.