In the last fifteen years or so I have found myself at odds with friends, colleagues, and other luminaries over whether the changes among political activists within the major political parties are real but modest in their impact or whether, as I believe, the changes are fundamental. Most commentaries on political parties by pundits and political scientists give no clue that anything fundamental has occurred. The Democratic party is described as if it were still the party of Harry Truman and Hubert Humphrey, and the Republican party is still conceived as tantamount to the party of Dwight Eisenhower and Richard Nixon. True, the presidency of Ronald Reagan led to discussions of a strong conservative trend; by and large, however, this trend is treated as an aberration, a product of Reagan's peculiar personality and popularity rather than an indicator of basic change within the Republican party.