The Drama of Love and Death: A Study of Human Evolution and Transfiguration. Edward Carpenter

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СКАЧАТЬ up into a numerous progeny.^[3]

       So far there seems to be but little differentiation between Hunger and Love. Love is only a special hunger which leads cells to obtain nourishment from other cells of the same species; and generation or reproduction in these early stages, being an inevitable accompaniment of growth, follows on the satisfaction of love just as it follows on the satisfaction of hunger. Rolph’s words on the relation of these two impulses (quoted by Geddes and Thompson) are very suggestive. He says:—“Conjugation occurs when nutrition is diminished. … It is a necessity for satisfaction, a growing hunger, which drives the animal to engulf its neighbor, to ‘isophagy.’ The process of conjugation is only a special form of nutrition, which occurs on a reduction of the nutritive income, or an increase of the nutritive needs.”

      And so far there is no distinction of sex. It is true there may be sex in the sense of union or fusion between two individuals; but there is no distinction of sex, in the sense of male and female. In the Protozoa generally there is simple union or conjugation between cells, which, as far as can be observed, are quite similar to each other. It is a union between similars; and it leads to growth and reproduction. But both union and reproduction at this early stage exist quite independently of any distinctive sex-action, or any differentiation of individuals into male and female.

      At a later period, however, Sex comes in. It is obvious that for growth (and reproduction) two things are necessary, which are in some degree antagonistic to each other—on the one hand the pursuit and capture of food, which means activity and force, and on the other hand the digestion and assimilation of the food, which means quiescence and passivity. And it seems that at a certain stage—in general, when “animals” have already been formed by the conjunction of many protozoic cells in co-operative colonies—this differentiation sets in, and some individuals specialize towards activity and the chase, while others (of the same species) specialize towards repose and assimilation. The two sets of qualities are clearly only useful in combination with each other, and yet, as I have said, they are to some degree contrary to each other; and therefore it is quite natural that the two corresponding groups of individuals should form two great branches in each race, diverse yet united.

      These two branches are the male and female—the active, energy-spending, hungry, food-obtaining branch; and the sessile, non-active, assimilative and reproductive branch. And by the division of labor consequent on the formation of these two branches the whole race is benefited; but only of course on condition that the diverse elements are reunited from time to time. It is in the fusion of these elements that the real quality and character of the race is restored; and it is by their fusion that development and reproduction are secured.

       In some of the Infusorians^[4] there seems to be a beginning of sex-differentiation, and fusion takes place between two individuals slightly differing from each other; but as we have already seen, in most of the Protozoa the union is a union of similars—that is, as far as can at present be observed, though of course there is a great probability that here also there is generally some difference which supplies the attraction and the value of union.^[5]

      It is in the Metazoa generally, and those forms of life which consist of co-operative colonies of cells, that sex-differentiation into male and female begins to decisively assert itself. Here—since it is obviously impossible for all the cells of one individual to fuse with all the cells of another—certain special cells are set apart in each organism for the purpose of union or conjugation; and it seems quite natural that in the course of time the differentiation spoken of above, into male and female, should set in—each individual tending to become decisively either masculine or feminine—both in the sex-cells or sex-apparatus, and (though in a less marked degree) in the general ‘body’ and structure.

      In the lower forms of life, generally, as among the amphibia, fishes, molluscs, &c., the male and female sex-cells—the sperm and the germ—do not conjugate within either of the parent bodies, but are expelled from each, in order to meet and fuse in some surrounding medium, like water. There the double cell, so formed, develops into the new individual. But in higher forms the meeting takes place, and the first stages of development ensue, within one of the bodies. And, as one might expect, this occurs within the body of the female. For the female, as we have said, represents quiescence, growth, assimilation. The germ or ovum is large compared with the spermatozoon; it is also sessile in habit. The spermatozoon, on the other hand, is exceedingly active. And so it seems natural that the latter should seek out the germ within the body of the female. Just as, in general, the female animal remains impassive and quiescent, and is sought out by the male, so the female germ remains at home within the female body, and receives its visitor or visitors there. And the whole apparatus of connection is symbolical of this relation. The body of the female is the temple in which the sacred mystery of the union or fusion of two individuals is completed, as a means to the birth or creation of a new individual.

      Yet though the female is thus privileged to be the receptacle and sanctum of the life-giving power, it must not be thought that this argues superiority of the female, as such, over the male. The process of conjunction is sometimes spoken of as a fertilization merely, implying the idea that the ovum or female element is the main thing, and that this only requires a slight impulse or stimulus from the male side for its powers of development to be started and set in operation. But though it is true that the ovum can in many cases of the lower forms of life be started developing by the administration of a chemical solution or even a mechanical needle-prick, this development does not seem to continue; and modern investigation shows that in normal fecundation an absolute equality reigns, as far as we can see, between the two contracting parties and their contributions to the new being that has to be formed.

      Nothing is more astounding than the results of these investigations; and they not only show us that the protozoic cells (and sex-cells), instead of being very simple in structure, are already extremely complex, and that their changes in the act of fertilization or fusion are strangely elaborate and systematic; but they suggest that though to us these cells may represent the microscopic beginnings of life in its most primitive stages, in reality they stand for the first visible results of long antecedent operations, and indicate highly organized and, we may say, intelligent forces at work within them.

      The mere process by which a primitive cell divides and reproduces itself has an air of demonic intelligence about it. Roughly, the process may be described as follows. The nucleus appears to be the most important portion of a cell. Certainly it is so as regards the supply of hereditary and formative material—the surrounding protoplasm fulfilling more of a nutritive and protective function. Within and through the liquid of the nucleus there spreads an irregular network of a substance which is (for a purely accidental reason) called chromatin. As long as the nucleus is at rest, this network is fairly evenly distributed through it; but the first oncoming of division is signalled by the break-up of the chromatin into a limited and definite number of short, threadlike bodies—to which the name chromosomes has been given. These chromosomes, after some curious evolutions, finally arrange themselves in a line across the middle of the nucleus; and they are apparently governed in this operation, and the whole splitting of the cell is governed, by a minute, starlike and radiating centre (called centrosome), which first appearing outside the nucleus and in the general protoplasm of the cell, seems to play a dominant part in the whole process. This centrosome, when the time comes for the cell-division, itself divides in two, and the two starlike centres so formed (which are to become centrosomes of the two new cells), slowly move to opposite ends or poles of the original cell—all the time, as they do so, throwing out raylike threads or fibrils which connect them somehow with the chromosomes and which seem to regulate the movements of the latter, till, as described, the latter form themselves in a line across the centre of the cell, transversely to the line joining the poles. At this stage, then, we have a tiny, starlike centrosome at each end of the cell, and a transverse line of chromosomes between. (Also, during the process the wall or enclosing membrane of the nucleus has disappeared and the general contents of cell and nucleus have become undivided.) СКАЧАТЬ