upset that the statement “man is mortal” would be anything but an empirical truth: immortal, an existent would no longer be what we call a man. One of the essential features of man’s destiny is that the movement of his temporal life creates behind and ahead of him the infinity of the past and the future: the perpetuation of the species appears thus as the correlative of individual limitation, so the phenomenon of reproduction can be considered as ontologically grounded. But this is where one must stop; the perpetuation of the species does not entail sexual differentiation. That it is taken on by existents in such a way that it thereby enters into the concrete definition of existence, so be it. Nevertheless, a consciousness without a body or an immortal human being is rigorously inconceivable, whereas a society can be imagined that reproduces itself by parthenogenesis or is composed of hermaphrodites.
Opinions about the respective roles of the two sexes have varied greatly; they were initially devoid of any scientific basis and only reflected social myths. It was thought for a long time, and is still thought in some primitive societies based on matrilineal filiation, that the father has no part in the child’s conception: ancestral larvae were supposed to infiltrate thewomb in the form of living germs. With the advent of patriarchy, the male resolutely claimed his posterity; the mother had to be granted a role in procreation even though she merely carried and fattened the living seed: the father alone was the creator. Artistotle imagined that the fetus was produced by the meeting of the sperm and the menses: in this symbiosis, woman just provided passive material, while the male principle is strength, activity, movement, and life. Hippocrates’ doctrine also recognized two types of seeds, a weak or female one, and a strong one, which was male. Artistotelian theory was perpetuated throughout the Middle Ages and down to the modern period. In the middle of the seventeenth century, Harvey, slaughtering female deer shortly after they had mated, found vesicles in the uterine horns that he thought were eggs but that were really embryos. The Danish scientist Steno coined the term “ovaries” for the female genital glands that had until then been called “feminine testicles,” and he noted the existence of vesicles on their surface that Graaf, in 1672, had erroneously identified as eggs and to which he gave his name. The ovary was still regarded as a homologue of the male gland. That same year, though, “spermatic animalcules” were discovered penetrating the feminine womb. But it was thought that they went there for nourishment only, and that the individual was already prefigured in them; in 1694, the Dutchman Hartsoeker drew an image of the homunculus hidden in the sperm, and in 1699 another scientist declared he had seen the sperm cast off a kind of slough under which there was a little man, which he also drew. In these hypotheses woman merely fattened a living and active, and perfectly constituted, principle. These theories were not universally accepted, and discussion continued until the nineteenth century. The invention of the microscope led to the study of the animal egg; in 1827, Baer identified the mammal’s egg: an element contained inside Graaf’s follicle. Soon its structure could be studied; in 1835, the sarcode—that is, the protoplasm—and then the cell were discovered; in 1877, the sperm was observed penetrating the starfish egg. From that the symmetry of the two gametes’ nuclei was established; their fusion was analyzed in detail for the first time in 1883 by a Belgian zoologist.
But Aristotle’s ideas have not lost all validity. Hegel thought the two sexes must be different: one is active and the other passive, and it goes without saying that passivity will be the female’s lot. “Because of this differentiation, man is thus the active principle while woman is the passive principle because she
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