It was Chamberlain who had the greatest impact, however, with his book The Foundations of the Nineteenth Century, published in 1900. In this vaporous and mystical work Chamberlain portrayed history in terms of a struggle for supremacy between the Germanic and Jewish races, the only two racial groups that retained their original purity in a world of miscegenation. Against the heroic and cultured Germans were pitted the ruthless and mechanistic Jews, whom Chamberlain thus elevated into a cosmic threat to human society rather than simply dismissing them as a marginal or inferior group.