Piper returns to U.S. Flies from Cambridge to Paris for four days to see Paris-Moscow, 1900-1930 exhibit at Centre Pompidou, Beaubourg. Premieres Aspects of the Liberal Dilemma at Artists Space in New York. First philosophy article published, "Utility, Publicity, and Manipulation." Listens to Crosby, Stills, Nash & Young, discovers The Mary Tyler Moore Show.