The boy baby feels it first; and that we have touched on. The home teaches the boy that women were made for service, domestic service, that the principal cares and labours of life are those which concern the body, and that his own particular tastes and preferences are of enormous importance. As fast as he gets out of the home and into the school, he learns quite other things, getting his exaggerated infant egotism knocked out of him very suddenly, and, as he gets out of school and into business, also into politics, he learns still further of the conditions of life. Proportion changes, perspective changes; he grows to have a very different view of life from the woman's view. The same thing happening to a man and a woman produces a widely varying effect; what is a trifle in the day's large activities to him is an event of insistent pressure to her; and, here, in the eternal misunderstanding between the home-bred woman and the world-bred man, lie the seeds of ceaseless trouble. The different range of vision of the occupant of the home and the occupant of the world makes it impossible for them to see things similarly. We are familiar with the difference, but have always considered it a distinction of sex. We have called the broader, sounder, better balanced, more fully exercised brain "a man's brain," and the narrower, more emotional and personal one "a woman's brain"; whereas the difference is merely that between the world and the house. The absolute relation between any animal's brain and his range of activity is patent to the zoölogist, and simply furnishes the proof of its law of development. The greater the extent and complexity of any creature's business, the greater the mental capacity, of course. We are familiar with the mental effect of living on small islands--"the insular mind," "insular prejudice" are well known terms. The smaller the island, the more deprived of contact and association with the rest of the world, the greater the insularity of mind. The Englishman is somewhat affected by the size of his country; the Manxman still more, and the dwellers on the lighthouse rock most of all. Our homes are not physically isolated, save on scattered farms and ranches--where the worst results are found; but they are isolated in their interests and industries.