Man is neither unique nor central nor necessarily here to stay. But he is a product of circumstances special to the point of disbelief. And if man in his current predicament seeks a fair mystique to see him through, then I can only suggest that he consider his genes. For they are marked. They are graven by luck beyond explanation. They are stamped by forces that we shall never know. But even so, in the hieroglyph of the human emergence certain symbols must stand for all to read: Change is the elixir of the human circumstance, and acceptance of challenge the way of our kind. We are bad-weather animals, disaster's fairest children. For the soundest of evolutionary reasons man appears at his best when times are worst.

African Genesis: A Personal Investigation into the Animal Origins and Nature of Man (1961)