That is the same as saying that a man must not jump into the water ... unless he has learned beforehand to swim, while remaining on land. Nothing, on the contrary, is more in harmony with the scientific inductions of biology and sociology than the socialist idea, according to which changes in the environment cause correlative changes, both physiological and psychical, in individuals. The soul of Darwinism, is it not wholly in the variability, organic and functional, of individuals and species, under the modifying influence of the environment, fixed and transmitted by natural selection? And neo-Darwinism itself, does it not consist wholly in the constantly increasing importance attributed to the changes in the environment as explanations of the variations of living beings? And, in the realm of sociology, just as, according to the repeated and unquestioned demonstrations of Spencer, in the passage of human societies from the military type to the industrial type--as Saint-Simon had already pointed out--a change, a process of adaptation, also takes place in that "human nature" which the anti-socialists would have us believe is a fixed and immutable thing, like the "created species" of old-school biology; in the same way, in the gradual transition to a collectivist organization, human nature will necessarily adapt itself to the modified social conditions. Certainly, human nature will not change in its fundamental tendencies; and, as an illustration, man like the animals will always shun suffering and strive after pleasure, since the former is a diminution and the latter an augmentation of life; but this is not inconsistent with the fact that the application and direction of these biological tendencies can and must change with the changes in the environment. So that I have been able elsewhere to demonstrate that individual egoism will, indeed, always exist, but it will act in a profoundly different fashion, in a society whose conscious goal will be true human solidarity, from the way in which it acts in the individualist and morally anarchical world of to-day, a world in which every man, by the working of what is called "free competition," is forced to follow the impulses of his anti-social egoism, that is to say, to be in conflict, and not in harmony, with the wants and the tendencies of the other members of society. But the repetition of worn-out commonplaces reaches its climax when M. Garofalo--surely, through inattention--writes these marvelous lines: "Apparently, many young men of aristocratic families do not work. It is nevertheless more correct to say that they do not do any productive labor for themselves, but they work just the same (!!), and this for the benefit of others!