Coined by Republican strategist Kevin Phillips in 1969 to describe the new alloy of conservatism that united voters across the southern rim of the country, the term "Sunbelt" has since gained currency in the American lexicon. By the early 1970s, the region had come to embody economic growth and an ambitious political culture. With sprawling suburban landscapes, cities like Atlanta, Dallas, and Los Angeles seemed destined to sap influence from the Northeast. Corporate entrepreneurialism and a conservative ethos helped forge the Sunbelt's industrial-labor relations, military spending,...