As indicated above the business center may usually be taken as the base point or community center, from which to determine the boundaries of the community. However, in the older parts of the country or in hilly or mountainous regions, the trade or business center is not always the same as the center of the chief social activities of the people, and may not be the chief factor in determining the community center. Not infrequently a church, school and grange hall located close together may form the nucleus of a community which does its business at a railroad station village some distance away, possibly over a range of hills. The chief trading points cannot, therefore, be arbitrarily assumed as the base points for determining community areas, but those points at which the more important of the common interests of the people find expression should be considered as community centers. It is not simply a question of where the people go most often, but of where their chief interests focus. With this concept of a community it is obvious that the "center" of a community must be the base point for determining its area. It would seem that the community center is essential to the individuality of any community: The community "center" need not necessarily be at the geographical center of the community; indeed in many cases it is at or close to one of its boundaries, though in an open level country it will tend to approximate the center. The term "community center" is here used in a literal sense of being the center of the activities of the community. It should be distinguished from the "community-center idea" which refers to a building, whether it be a community house, school, church, or grange hall, as a "community center." Such a building in which the activities of the community are largely centered may be a community center in a very real sense, but in most cases these activities will be divided between church, school, grange hall, etc. No one of them can then be a center for the whole community, but taken together they constitute the center in which the chief interests of the community focus. Every community must necessarily have a more or less well defined community center; it may or may not have some one building in which the chief activities of the community have their headquarters. Such buildings, of whatever nature, may well be called community houses or social centers.