Lecture VI
The principles worked in such a way that the principle of form prevailed, holding a group of human beings to the form they had then attained. What was the consequence? Forms may be hardened and held back, but evolution as a whole goes forward, so that forms which have thus been held back artificially arrive at a time later on to which they are no longer suited. A time came when there was less moisture in the air, when climatic conditions changed and were no longer adapted to those who had remained behind.
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