Biologists From France

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April 10, 2026

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"The average age at which a man marries is thirty years; the average age at which his passions, his most violent desires for genesial delight are developed, is twenty years. Now during the ten fairest years of his life, during the green season in which his beauty, his youth and his wit make him more dangerous to husbands than at any other epoch of his life, his finds himself without any means of satisfying legitimately that irresistible craving for love which burns in his whole nature. During this time, representing the sixth part of human life, we are obliged to admit that the sixth part or less of our total male population and the sixth part which is the most vigorous is placed in a position which is perpetually exhausting for them, and dangerous for society. “Why don’t they get married?” cries a religious woman. But what father of good sense would wish his son to be married at twenty years of age? Is not the danger of these precocious unions apparent at all? It would seem as if marriage was a state very much at variance with natural habitude, seeing that it requires a special ripeness of judgment in those who conform to it. All the world knows what Rousseau said: “There must always be a period of libertinage in life either in one state or another. It is an evil leaven which sooner or later ferments.” Now what mother of a family is there who would expose her daughter to the risk of this fermentation when it has not yet taken place?"

- Jean-Jacques Rousseau

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"Sensitivity is the principle of all action. A being, albeit animated, who would feel nothing, would never act, for what would its motive for acting be? God himself is sensitive since he acts. All men are therefore sensitive, and perhaps to the same degree, but not in the same manner. There is a purely passive physical and organic sensitivity which seems to have as its end only the preservation of our bodies and of our species through the direction of pleasure and pain. There is another sensitivity that I call active and moral which is nothing other than the faculty of attaching our affections to beings who are foreign to us. This type, about which study of nerve pairs teaches nothing, seems to offer a fairly clear analogy for souls to the magnetic faculty of bodies. Its strength is in proportion to the relationships we feel between ourselves and other beings, and depending on the nature of these relationships it sometimes acts positively by attraction, sometimes negatively by repulsion, like the poles of a magnet. The positive or attracting action is the simple work of nature, which seeks to extend and reinforce the feeling of our being; the negative or repelling action, which compresses and diminishes the being of another, is a combination produced by reflection. From the former arise all the loving and gentle passions, and from the latter all the hateful and cruel passions."

- Jean-Jacques Rousseau

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"This peculiar thinker - although often described as irrationalist or romantic - also latched on to and deeply depended on Cartesian thought. Rousseau's heady brew of ideas came to dominate 'progressive' thought, and led people to forget that freedom as a political institution had arisen not by human beings 'striving for freedom' in the sense of release from restraints, but by their striving for the protection of a known secure individual domain. Rousseau led people to forget that rules of conduct necessarily constrain and that order is their product; and that these rules, precisely by limiting the range of means that each individual may use for his purposes, greatly extend the range of ends each can successfully pursue. It was Rousseau who - declaring in the opening statement of The Social Contract that 'man was born free, and he is everywhere in chains', and wanting to free men from all 'artificial' restraints - made what had been called the savage the virtual hero of progressive intellectuals, urged people to shake off the very restraints to which they owed their productivity and numbers, and produced a conception of liberty that became the greatest obstacle to its attainment. (...) The admittedly great seductive appeal of this view hardly owes its power (whatever it may claim) to reason and evidence. (...) Despite these contradictions, there is no doubt that Rousseau's outcry was effective or that, during the past two centuries, it has shaken our civilisation. Moreover, irrationalist as it is, it nonetheless did appeal precisely to progressivists by its Cartesian insinuation that we might use reason to obtain and justify direct gratification of our natural instincts."

- Jean-Jacques Rousseau

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"Thus, in the eighteenth century, when nearly all the instructed, and all those of the uninstructed who were led by them, were lost in admiration of what is called civilisation, and of the marvels of modern science, literature, and philosophy, and while greatly overrating the amount of unlikeness between the men of modern and those of ancient times, indulged the belief that the whole of the difference was in their own favour; with what a salutary shock did the paradoxes of Rousseau explode like bombshells in the midst, dislocating the compact mass of one-sided opinion, and forcing its elements to recombine in a better form and with additional ingredients. Not that the current opinions were on the whole farther from the truth than Rousseau's were; on the contrary, they were nearer to it; they contained more of positive truth, and very much less of error. Nevertheless there lay in Rousseau's doctrine, and has floated down the stream of opinion along with it, a considerable amount of exactly those truths which the popular opinion wanted; and these are the deposit which was left behind when the flood subsided. The superior worth of simplicity of life, the enervating and demoralising effect of the trammels and hypocrisies of artificial society, are ideas which have never been entirely absent from cultivated minds since Rousseau wrote; and they will in time produce their due effect, though at present needing to be asserted as much as ever, and to be asserted by deeds, for words, on this subject, have nearly exhausted their power."

- Jean-Jacques Rousseau

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"But Rousseau — to what did he really want to return? Rousseau, this first modern man, idealist and rabble in one person — one who needed moral "dignity" to be able to stand his own sight, sick with unbridled vanity and unbridled self-contempt. This miscarriage, couched on the threshold of modern times, also wanted a "return to nature"; to ask this once more, to what did Rousseau want to return? I still hate Rousseau in the French Revolution: it is the world-historical expression of this duality of idealist and rabble. The bloody farce which became an aspect of the Revolution, its "immorality," is of little concern to me: what I hate is its Rousseauan morality — the so-called "truths" of the Revolution through which it still works and attracts everything shallow and mediocre. The doctrine of equality! There is no more poisonous poison anywhere: for it seems to be preached by justice itself, whereas it really is the termination of justice. "Equal to the equal, unequal to the unequal" — that would be the true slogan of justice; and also its corollary: "Never make equal what is unequal." That this doctrine of equality was surrounded by such gruesome and bloody events, that has given this "modern idea" par excellence a kind of glory and fiery aura so that the Revolution as a spectacle has seduced even the noblest spirits."

- Jean-Jacques Rousseau

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