Animals are also _selected_, are enabled to survive in the struggle for life quite as much through the possession by them of certain mental qualities as on account of their physical characters. Whether the selections are made by nature or by man, they are not determined by the physical facts of size, strength, speed, and the like, more than by cunning, courage, sagacity, skill, industry, devotion, ferocity, tractability, and other mental properties. The fittest survive, and the fittest may be the most timid or analytic as well as the most powerful. No better illustration of this truth can be found than that furnished by man himself. Man is by nature a comparatively feeble animal. He is neither large nor powerful. Yet he has been selected to prosper over all other animals because of his ingenuity, sympathy, and art. The great feeling and civilisation of higher men have been built up by slow accretion due to the operation of the law of survival extending over vast measures of time. Creeds and instincts, governments and impulses, forms of thought and forms of expression, have struggled and survived just as have cells and species. A struggle for existence is constantly going on, as Max Müller has pointed out, even among the words and grammatical forms of every language. The better, shorter, easier forms are constantly gaining the ascendancy, and the longer and more cumbrous expressions grow obsolete. If, therefore, the higher types of mind have not come into existence as have the higher types of structure, through evolution from simpler and more generalised forms, it has not been due to the absence of the factors necessary for bringing about this evolution. 5. The presumption created by the existence of the factors of psychic evolution is strengthened by the facts of artificial selection. We _know_ mind _can_ evolve, _for it has done so in many cases_. The races of domesticated animals, the races whom man has exploited and preyed upon during the past several thousand years, have, many of them, been completely changed in character and intelligence through human selection. Old instincts have been wiped out and new ones implanted. In many instances the psychology has been not only revolutionised, but remade.