It may come as an unwelcome surprise to conservatives, but America’s military has one of the only working models of collective living and social welfare the country has ever known.Every day before dawn, brave men and women of different races and backgrounds rise as one, united by a common cause. They march together in formation, kept in step by their voices joined in song. These workers leave their communal housing arrangements and go toil together “in the field.” While they are out doing their day’s labor, their young are cared for in subsidized childcare programs. If they hurt themselves on...