trade, which, on a small scale, may be compared to what we to-day witness and share; a progress for which, then as now, the chief condition was peace. As soon as men realised that peace gives that greater wealth, those enjoyments more refined, that higher culture, which for a century they had sought by war, Italy became quiet; revolutionists became guardians and guards of order; there gathered about Augustus a coalition of social forces that tended to impose on the Empire, alike on the parts that wished it and those that did not, the Pax Romana.
Now all this immense story that fills three centuries, that gathers within itself so many revolutions, so many legislative reforms, so many great men, so many events, tragic and glorious, this vast history that for so many centuries holds the interest of all cultured nations, and that, considered as a whole, seems almost a prodigy, you can, on the track of the old idea of "corruption," explain in its profoundest origins by one small fact, universal, common, of the very simplest—something that every one may observe in the limited circle of his own personal experience,—by that automatic increase of ambitions and desires, with every new generation, which prevents the human world from crystallising in one form,
