3. repeated in many successive situations. 4. definitely related to other patterns in the same social aggregate. Streams of people move from room to room and building to building at appointed hours. Books are ordered and delivered. Buildings are lighted, heated, and sometimes cooled.
Food is served at cafeterias.
Masses of people appear at athletic events scheduled months in advance. Students form cliques and friendship constellations. Without some rough predictability as to what other people will do under given circumstances, there could be no continuing human association, no adjustment, no cooperation. Each will be equally acceptable. The first main concept is culture.