by itself, out of relation to earlier works, and then, having discovered that these earlier works resembled it, decided that everything it had to say was borrowed. Had they begun their study in a truly historical spirit, they would have seen that Rousseau’s importance lies just in the new use he makes of old ideas, in the transition he makes from old to new in the general conception of politics. No mere innovator could have exercised such an influence or hit on so much truth. Theory makes no great leaps; it proceeds to new concepts by the adjustment and renovation of old ones. Just as theological writers on politics, from Hooker to Bossuet, make use of Biblical terminology and ideas; just as more modern writers, from Hegel to Herbert Spencer, make use of the concept of evolution, Rousseau uses the ideas and terms of the Social Contract theory. We should feel, throughout his work, his struggle to free himself from what is lifeless and outworn in that theory, while he develops out of it fruitful conceptions that go beyond its scope.