Fewer Americans are getting married these days, and like many other topics, marriage “has become a clear dividing line in a stratified country. Its decline is most pronounced among those who didn’t go beyond high school, as better educated people tend to marry each other. America’s working and middle classes are faring badly, and the research points to unraveling families as one cause.” To better understand the numbers, let’s go to a place being hit hard by the marriage decline: Las Vegas.