Such is the case when we wish to ascertain from natural law what social form is natural and applicable, and this is just what the bourgeois Darwinists did. They drew the inference that the laws which govern in the animal world, where the Darwinian theory applies, apply with equal force in the capitalist system, and that therefore capitalism is a natural order and must endure forever. On the other hand, there were some Socialists who desired to prove that, according to Darwin, the Socialist system is the natural one. Said these Socialists, “Under capitalism men do not carry on the struggle for existence with like tools, but with unlike ones artificially made. The natural superiority of those that are healthier, stronger, more intelligent or morally better, is of no avail so long as birth, class, or the possession of money control this struggle. Socialism, in abolishing all these artificial dissimilarities, will make equal provisions for all, and then only will the struggle for existence prevail, wherein the real personal superiorities will be the deciding factors.” These critical arguments, while they are not bad when used as refutations against bourgeois Darwinists, are still faulty. Both sets of arguments, those used by the bourgeois Darwinists in favor of capitalism, and those of the Socialists, who base their Socialism on Darwin, are falsely rooted. Both arguments, although reaching opposite conclusions, are equally false because they proceed from the wrong premises that there is a natural and a permanent system of society. Marxism has taught us that there is no such thing as a natural and a permanent social system, and that there can be none, or, to put it another way, every social system is natural, for every social system is necessary and natural under given conditions. There is not a single definite social system that can be accepted as natural; the various social systems take the place of one another as a result of developments in the means of production. Each system is therefore the natural one for its particular time. Capitalism is not the only natural order, as the bourgeoisie believes, and no Socialist system is the only natural system, as some Socialists try to prove. Capitalism was natural under the conditions of the nineteenth century, just as feudalism was in the Middle Ages, and as Socialism will be in the coming age. The attempt to put forward a certain system as the only natural and permanent one is as futile as if we were to take an animal and say that this animal is the most perfect of all animals. Darwinism teaches us that every animal is equally adapted and equally perfect in form to suit its special environments, and Marxism teaches us that every social system is particularly adapted to its conditions, and that in this sense it may be called good and perfect.