No matter what modifications further study may necessitate it would seem that at last we are reaching the point where definite measurements may be made of man's reactions to the physical world, and we may hope for much greater knowledge in the near future. - Kelsey, The Physical Basis of Society, p. 41.

... It is impossible to understand man unless we understand his physical setting, the conditions of his life, the realities that surround him, the favorable and the unfavorable accidents promoting or opposing his well-being. To comprehend and appreciate the drama of human life we need to familiarize ourselves with its scenery and staging no less than with the characters and their sentiments. ... - Clarke, The School and Other Educators, p. 129.

The group of people who constitute a society must take account of their location. If the group moves from one location to another, its organization must be readjusted to fit the new location. This becomes apparent when a family moves from one house to another, when a class in school changes its meeting place from one room to another, when a business establishment changes from one building to another.

The social organization of a nation takes its impress from the country which it inhabits. In building a city the human factor must combine with the geographical factor; the lay of the land on which the city stands, and also of the land far beyond its limits, decides many things about it. An educational system also must walk on the earth; it must fit the locality, or else fit the locality to itself, and in the latter case it must employ fit instruments and methods. In a sense, man and all his works are a part of the earth - a superficial variation which has appeared on the earth's crust in recent geological time.

The full treatment of these interrelations between a people and the land they inhabit belongs to geography one part of it, the share of natural agents in the production of wealth, is treated in economics. But sociology must restate from its own viewpoint whatever principles it takes from these sciences.