SUBURBAN sprawl, the spread of low-density housing over an ever-expanding landscape, has attracted a growing list of enemies. Environmentalists have long decried the effects of sprawl on the ecosystem; aesthetes have long derided what they saw as “the ugliness and banality of suburbia”; and liberals have intermittently insisted that suburban prosperity has been purchased at the price of inner-city decline and poverty. But only recently has sprawl become the next great issue in American public life.  That’s because suburbanites themselves are now calling for limits to seemingly inexorable and frenetic development.