You Cannot Get Away | My Web Site Page 003 Chapter 01 Page 01

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In all biological thinking we have to work with the categories Organism--Function--Environment, and theories of evolution may be classified in relation to these. To some it has always seemed that the fundamental fact is the living organism,--a creative agent, a striving will, a changeful Proteus, selecting its environment, adjusting itself to it, self-differentiating and self-adaptive. The necessity of recognising the importance of the organism is admitted by all Darwinians who start with inborn variations, but it is open to question whether the whole truth of what we might call the Goethian position is exhausted in the postulate of inherent variability. To others it has always seemed that the emphasis should be laid on Function,--on use and disuse, on doing and not doing. Practice makes perfect; _c'est a force de forger qu'on devient forgeron_. This is one of the fundamental ideas of Lamarckism; to some extent it met with Darwin's approval; and it finds many supporters to-day. One of the ablest of these--Mr. Francis Darwin--has recently given strong reasons for combining a modernised Lamarckism with what we usually regard as sound Darwinism.[16]

Thus we have in these apparently random forms of the calcereous bodies, complex adaptations in which every little detail as to direction, curve, and pointing is exactly determined. That they have selection-value in their present perfected form is beyond all doubt, since the animals are enabled by means of them to bore rapidly into the ground and so to escape from enemies. We do not know what the initial stages were, but we cannot doubt that the little improvements, which occurred as variations of the originally simple slimy bodies of the Holothurians, were preserved because they already possessed selection-value for the Synaptidae. For such minute microscopic structures whose form is so delicately adapted to the role they have to play in the life of the animal, cannot have arisen suddenly and as a whole, and every new variation of the anchor, that is, in the direction of the development of the two arms, and every curving of the shaft which prevented the tips from projecting at the wrong time, in short, every little adaptation in the modelling of the anchor must have possessed selection-value. And that such minute changes of form fall within the sphere of fluctuating variations, that is to say, _that they occur_ is beyond all doubt.

As regards eugenics, there is no doubt that a vast and persistent elimination of lives goes on even in civilized countries. It has been calculated that, of every hundred English born alive, fifty do not survive to breed, and, of the remainder, half produce three-quarters of the next generation. But is the elimination selective? We can hardly doubt that it is to some extent. But what its results are--whether it mainly favours immunity from certain diseases, or the capacity for a sedentary life in a town atmosphere, or intelligence and capacity for social service--is largely matter of guesswork. How, then, can we say what is the type to breed from, even if we confine our attention to one country? If, on the other hand, we look farther afield, and study the results of race-mixture or "miscegenation," we but encounter fresh puzzles. That the half-breed is an unsatisfactory person may be true; and yet, until the conditions of his upbringing are somehow discounted, the race problem remains exactly where it was. Or, again, it may be true that miscegenation increases human fertility, as some hold; but, until it is shown that the increase of fertility does not merely result in flooding the world with inferior types, we are no nearer to a solution.

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