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416 requires. Because on the length of time it will depend whether the data which the plan assumes as given, will in truth remain the same. There is a factor here which realistic and experienced men do take into account, and it helps to mark them off somehow from the opportunist, the visionary, the philistine and the pedant. But just how the calculation of time enters into politics we do not know at present in any systematic way.

Until we understand these matters more clearly, we can at least remember that there is a problem of the utmost theoretical difficulty and practical consequence. It will help us to cherish Plato's ideal, without sharing his hasty conclusion about the perversity of those who do not listen to reason. It is hard to obey reason in politics, because you are trying to make two processes march together, which have as yet a different gait and a different pace. Until reason is subtle and particular, the immediate struggle of politics will continue to require an amount of native wit, force, and unprovable faith, that reason can neither provide nor control, because the facts of life are too undifferentiated for its powers of understanding. The methods of social science are so little perfected that in many of the serious decisions and most of the casual ones, there is as yet no choice but to gamble with fate as intuition prompts.

But we can make a belief in reason one of those