The residence hall in the United States has come to mark the threshold between childhood and adulthood, housing young people during a transformational time in their lives. When parents drop their kids off at college, do they pose in front of a classroom building or the library? Maybe. But it’s the unloading of clothes, computers, and comforters at the dorms that defines the break between childhood and adulthood.

This rite of passage is taken much more seriously by Americans than by …