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.