One could go on indefinitely illustrating the boundaries of interests of various kinds. Some of them centered in the State House; others in the national Capitol; and many a wordy political battle was fought in the little country section over the question as to whether the protective tariff or the Democratic party was responsible for the hard times the farmers and others were suffering. There were even world interests involved, as during the Spanish-American War or the Venezuelan difficulty during Cleveland's administration. This concrete illustration both raises the question, Which of these is the "community?" and also points the way to the answer. None of the groupings mentioned can be considered "_the_ community." Yet each is "_a_ community." A "community" is a psychical and not a physical thing. It can only approximately be bounded by physical lines. In the last analysis the true "community" is nothing more nor less than that group of two or more individuals who are bound together by a single interest. Thus two people living within sight of one another may be members of the same religious community and at the same time be absolutely separated from one another in their political affiliations. Also one person can at the same time belong to many "communities." But this definition, if adhered to strictly, would lead to confusion of thought perhaps more serious than a less accurate use of the term. Careful investigation of the relation of the different psychic communities to one another reveals the fact that geographically the areas of individual community interest overlap one another; and that in the better organized regions the centers of interests coincide and it is only the boundaries of the several interests that are not coterminous. The Mifflin Center illustration given above is good in that it had the religious, educational and political interests centered at one physical spot. The social and recreational life of a large part of this local area also was centered here. In the other local groups mentioned there was a division of interest much more marked. A more practical definition, then, of a "community" would be "That aggregation of population which is bound together by a predominating proportion of its local interests."