Marxism, like Darwinism, is the highest school of human thought. Methods of warfare cannot be deduced from Darwin's theory, from the law of natural selection, but a military leader who had studied Darwin, would, given the presence of other qualities, be better equipped thereby: he would have a wider horizon and be more resourceful, he would take note of aspects of nature and of man which previously he had not noticed. This applies to an even greater extent to Marxism.
Leon Trotsky
1879 - 1940