"if it be true . . . that an aristocracy distinguished merely by wealth must perish from satiety, so I hold it equally true that a people who recognise no higher aim than physical enjoyment must become selfish and enervated. Under such circumstances the supremacy of race which is the key of history will assert itself. Some human progeny, distinguished by their bodily vigour or their masculine intelligence . . . will assert their superiority and conquer a world which deserves to be enslaved. It will then be found that our boasted progress has only been an advancement in a circle, and that our new philosophy has brought us back to that old serfdom which it has taken ages to extirpate."