mode of associated or community life, quite as much as is a
family, a town, or a state. There are also communities whose
members have little or no direct contact with one another, like
the guild of artists, the republic of letters, the members of the
professional learned class scattered over the face of the earth.
For they have aims in common, and the activity of each member is
directly modified by knowledge of what others are doing.

In the olden times, the diversity of groups was largely a
geographical matter. There were many societies, but each, within
its own territory, was comparatively homogeneous. But with the
development of commerce, transportation, intercommunication, and
emigration, countries like the United States are composed of a
combination of different groups with different traditional
customs. It is this situation which has, perhaps more than any
other one cause, forced the demand for an educational institution
which shall provide something like a homogeneous and balanced
environment for the young. Only in this way can the centrifugal
forces set up by juxtaposition of different groups within one and
the same political unit be counteracted. The intermingling in
the school of youth of different races, differing religions, and
unlike customs creates for all a new and broader environment.
Common subject matter accustoms all to a unity of outlook upon a
broader horizon than is visible to the members of any group while
it is isolated. The assimilative force of the American public
school is eloquent testimony to the efficacy of the common and
balanced appeal.

The school has the function also of coordinating within the
disposition of each individual the diverse influences of the