DeDanaan

Filed by Aine MacDermot

The brilliant discoveries of Dr. Jacques Loeb and of M. Yves Delage have demolished absolutely the old idea that each organ and each tissue contained in embryo in the normal egg-germ must develop in a particular and coordinate way into a normal organism and after the parental type: it is possible to make a head grow where there ought to be feet; and at Zürich, Standfuss, solely through changing the temperature of his laboratory, was able to obtain from the same species of butterfly forms which were tropical and forms which were arctic. 1 All this helps to establish the hypothesis, which amounts to certainty, that the conformation of a physical body, or even the kind of species to be born, is directly determined by physical environment and not by heredity, and that the chief factor to consider in organisms is the life animating the body. Physical environment affects only the physical organism; it does not affect the invisible and unknown life-principle resident within the physical organism.

The process of fertilization is a physical process. As such it is simply initiatory to embryonic evolution which also is physical. Once the proper physical conditions are set up by the parents, life pursues its marvellous progress in the womb of the human mother, from the amoeba-like initial embryo to man. That is to say, parents set in motion the laws governing, the reproduction of physical bodies. They create such conditions as enable the invisible life-force to begin its physical manifestation. 2 In the two fused germs from the parents resides the physical inheritance of the offspring, to be outwardly shaped by environment; but the physical inheritance is a thing distinct from the psychical part of the living being, just as much as the dead human body is a thing apart from the life which has left it. Though the old heredity theory is overthrown by late discoveries, the question as to what life is in human bodies under all possible environmental conditions remains unsolved; and so do the questions why there should be sports in nature, which among man are called geniuses, and why every human being has a distinct and highly developed individual character, essentially unlike that of his immediate ancestors.

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