We live in the suburban era. Well over half of all Americans and two-thirds of Canadians live in suburbs. Tracts of suburban bungalows ring Sydney and Melbourne. Suburban apartments rise on the outskirts of Paris, Prague, Singapore, and Beijing. Nearly everyone has a strong opinion about suburbs. Folks who love dense cities scorn "suburbia," while people who like big yards dislike bustling sidewalks and subways. Social scientists argue whether contemporary...