Conservatism proper is a legitimate, probably necessary, and certainly widespread attitude of opposition to drastic change. It has, since the French Revolution, for a century and a half played an important role in European politics. Until the rise of socialism its opposite was liberalism... There is nothing corresponding to this conflict in the history of the United States, because what in Europe was called ‘liberalism' was here the common tradition on which the American polity had been built: thus the defender of the American tradition was a liberal in the European sense.