[Footnote 1: Taking the social and professional status of a distinguished man's father as some index of the social environment to which he was subjected during his youth, we find some interesting examples: The father of John Keats was a livery stable-keep; his mother the daughter of one. Byron's father was a captain in the Royal Guards; his mother a Scottish heiress. Newton's father was a tanner; Pasteur's, a tanner; Darwin's, a doctor of considerable means. Francis Bacon's father was Lord Keeper of the Great Seal; Newton's was a farmer and the headmaster of a school; Turner was the son of a barber.] An individual, again, to a certain extent, makes his own environment. What kind of an environment he will make depends on the kinds of capacities and interests he has to start with. Similarity of original tendencies and interests brings men together as differences among these keep them apart. The libraries, the theaters, and the baseball parks are all equally possible and accessible features of their environment to individuals of a given economic or social class. Yet a hundred individuals with the same education and social opportunities will make themselves by choice a hundred different environments. They will select, even from the same physical environment, different aspects. The Grand Canon is a different environment to the artist and to the geologist; a crowd of people at an amusement park constitutes a different environment to the man who has come out to make psychological observations, and the man who has come out for a day's fun. A dozen men, teachers and students, selected at random on a university campus, might well be expected to note largely different though overlapping facts, as the most significant features of the life of the university.