The theory of universal evolution which--apart from such or such a more or less disputable detail--is truly characteristic of the vital tendency of modern scientific thought, has also been made to appear in absolute contradiction with the theories and the practical ideals of socialism. In this case the fallacy is obvious. If socialism is understood as that vague complex of sentimental aspirations so often crystallized into the artificial utopian creations of a new human world to be substituted by some sort of magic in a single day for the old world in which we live; then it is quite true that the scientific theory of evolution condemns the presumptions and the illusions of artificial or utopian political theories, which, whether they are reactionary or revolutionary, are always romantic, or in the words of the American Senator Ingalls, are "iridescent dreams." But, unfortunately for our adversaries, contemporary socialism is an entirely different thing from the socialism which preceded the work of Marx. Apart from the same sentiment of protest against present injustices and the same aspirations toward a better future, there is nothing in common between these two socialisms, neither in their logical structure nor in their deductions, unless it be the clear vision, which in modern socialism becomes a mathematically exact prediction (thanks to the theories of evolution) of the final social organization--based on the collective ownership of the land and the means of production. These are the conclusions to which we are led by the evidence of the facts--facts verified by a scientific examination of the three principal contradictions which our opponents have sought to set up between socialism and scientific evolution. From this point it is impossible not to see the direct causal connection between Marxian socialism and scientific evolution, since it must be recognized that the former is simply the logical consequence of the application of the evolutionary theory to the domain of economics. IX. THE ORTHODOX THESIS AND THE SOCIALIST THESIS IN THE LIGHT OF THE EVOLUTION THEORY. What, in substance, is the message of socialism? That the present economic world can not be immutable and eternal, that it merely represents a transitory phase of social evolution and that an ulterior phase, a differently organized world, is destined to succeed it. That this new organization must be collectivist or socialist--and no longer individualist--results, as an ultimate and certain conclusion, from the examination we have made of Darwinism and socialism. I must now demonstrate that this fundamental affirmation of socialism--leaving out of consideration for the moment all the details of that future organization, of which I will speak further on--is in perfect harmony with the experiential theory of evolutionism.