“On the Earth there will never be a higher Creature than Man”. It is a daring prophecy, but every probability of Science attests the likelihood of its fulfilment. The goal looked forward to from the beginning of time has been attained. Nature has succeeded in making a Man; she can go no further; Organic Evolution has done its work.

This is not a conceit of Science, nor a reminiscence of the pre-Copernican idea that the centre of the universe is the world, and the centre of the world Man. It is the sober scientific probability that with the body of Man the final fruit of the tree of Organic Evolution has appeared; that the highest possibilities open to flesh and bone and nerve and muscle have now been realized; that in whatever direction, and with whatever materials, Evolution still may work, it will never produce any material thing more perfect in design or workmanship; that in Man, in short, about this time in history, we are confronted with a stupendous crisis in Nature, —the Arrest of the Animal. The Man, the Animal Man, the Man of Organic Evolution, it is at least certain, will not go on. It is another Man who will go on, a Man within this Man; and that he may go on the first Man must stop. Let us try for a moment to learn what it is to stop. Nothing could teach Man better what is meant by his going on.