Americans have a healthy distrust of collective utopian visions after seeing how well that worked out for Germany in the 1930s and 1940s, for China in the 1950s and 1960s, for Cambodia between 1975 and 1979, etc.<p>My family and I attended Expo 67 in Montreal, and although it was a good time, it did not have any salient effects on the life aspirations or political beliefs of anyone in my family.