Today age segregation has passed all sane limits. Not only are fifteen-year-olds isolated from seventy-year-olds but social groups divide those in high school from those in junior high, and those who are twenty from those who are twenty-five. There are middle-middle-age groups, late-middle-age groups, and old-age groups - as though people with five years between them could not possibly have anything in common.

Lonely in America (ed. 1976)