University of California at Berkley professor Jack Block and his late wife, Jeanne Bock, tracked almost one hundred children for two decades. From nursery school on, the kids were studied and interviewed–without any sense of political bias. The whiniest, least confident kids were those who grew up to be uncomfortable with ambiguity, who toed a rigid line on social issues, and who were, for the most part, right wingers. The kids who were loose, interesting, and willing to challenge authority ended up being liberals.