Where Are All the Grownups?

The cover of last week’s New York Times Magazine asked: “What Is It About 20-Somethings?” We should be considering that question, author Robin Marantz Henig writes, because there is a growing incidence of youngish adults who “move back in with their parents,” “delay beginning career paths,” and “put off commitments” – who, in short, seem to be stuck in a period of extended adolescence.