Among the institutions of the community there will always be homes and something more: churches, schools, playgrounds, a communal hall, a local theater, perhaps, and, of course, business and industrial enterprises of some sort. Communities might well be classified by the number and variety of the institutions—cultural, political, and occupational—which they possess. This would indicate the extent to which they were autonomous or, conversely, the extent to which their communal functions were mediatized, so to speak, and incorporated into the larger community. There is always a larger community. Every single community is always a part of some larger and more inclusive one. There are no longer any communities wholly detached and isolated; all are interdependent economically and politically upon one another. The ultimate community is the wide world. _a_) _The ecological organization._—Within the limits of any community the communal institutions—economic, political, and cultural—will tend to assume a more or less clearly defined and characteristic distribution. For example, the community will always have a center and a circumference, defining the position of each single community to every other. Within the area so defined the local populations and the local institutions will tend to group themselves in some characteristic pattern, dependent upon geography, lines of communication, and land values. This distribution of population and institutions we may call the ecological organization of the community. Town-planning is an attempt to direct and control the ecological organization. Town-planning is probably not so simple as it seems. Cities, even those like the city of Washington, D.C., that have been most elaborately planned, are always getting out of hand. The actual plan of a city is never a mere artifact, it is always quite as much a product of nature as of design. But a plan is one factor in communal efficiency. _b_) _The economic organization._—Within the limits of the ecological organization, so far as a free exchange of goods and services exists, there inevitably grows up another type of community organization based on the division of labor. This is what we may call the occupational organization of the community. The occupational organization, like the ecological, is a product of competition. Eventually every individual member of the community is driven, as a result of competition with every other, to do the thing he _can do_ rather than the thing he _would like to do_. Our secret ambitions are seldom realized in our actual occupations. The struggle to live determines finally not only where we shall live within the limits of the community, but what we shall do.