"It wasn’t always like this. Living arrangements have been changing for thousands of years, and the concept of the nuclear family originated relatively recently. Even as the economy has moved away from the sort of agricultural labor that would encourage large households, people still have just as much of a need for the support of friends, family, and neighbors. Perhaps that is why so many people today—from young coders to lonely septuagenarians to families—are experimenting with communal living, a way of life that, whether they know it or not, echoes how things worked for most of human history. This sort of experimentation is all too appropriate at a time when, for the typical American child, having two married parents is on the decline, and there is no longer a single dominant family structure as there was a half-century ago."