Our own politics must be the touchstone for all theories. The principles on which to base a science of administration for America must be principles which have democratic policy very much at heart. And, to suit American habit, all general theories must, as theories, keep modestly in the background, not in open argument only, but even in our own minds-lest opinions satisfactory only to the standards of the library should be dogmatically used, as if they must be quite as satisfactory to the standards of practical politics as well.