The way we live in America is changing. We're moving away from the nuclear family model ofthe postwar era and rediscovering the old custom of several generations living under one roof. In thedecades of prosperity that followed the Second World War, the single-family suburban home came tosymbolize the American dream. Each nuclear family was supposed to be an island unto itself. In manytowns and cities, zoning laws actually made multi-family living illegal. Similar laws also banned the useof a home for business. The family was limited to the sphere of consumption; production wassupposed to take place in factories and offices far, far away from domestic happiness. Many of theseoutdated laws still exist, but it’s high time we scrapped them to reflect our changing habits. In an ageof low wages, high housing costs and increased single parenthood. it makes sense for extendedfamilies to share houses - and to use them for commercial purposes, be that teleworking, or using thepremises as a base for a start-up, or renting out a room on the Airbnb website. Allowing homes tomeet flexible modern needs is one badly-needed piece of the policy mix that car revitalize America'smiddle class.