disposition of their members.

Roughly speaking, they come into existence when social traditions
are so complex that a considerable part of the social store is
committed to writing and transmitted through written symbols.
Written symbols are even more artificial or conventional than
spoken; they cannot be picked up in accidental intercourse with
others. In addition, the written form tends to select and record
matters which are comparatively foreign to everyday life. The
achievements accumulated from generation to generation are
deposited in it even though some of them have fallen temporarily
out of use. Consequently as soon as a community depends to any
considerable extent upon what lies beyond its own territory and
its own immediate generation, it must rely upon the set agency of
schools to insure adequate transmission of all its resources. To
take an obvious illustration: The life of the ancient Greeks and
Romans has profoundly influenced our own, and yet the ways in
which they affect us do not present themselves on the surface of
our ordinary experiences. In similar fashion, peoples still
existing, but remote in space, British, Germans, Italians,
directly concern our own social affairs, but the nature of the
interaction cannot be understood without explicit statement and
attention. In precisely similar fashion, our daily associations
cannot be trusted to make clear to the young the part played in
our activities by remote physical energies, and by invisible
structures. Hence a special mode of social intercourse is
instituted, the school, to care for such matters.

This mode of association has three functions sufficiently
specific, as compared with ordinary associations of life, to be