Richard Posner, a Federal Appellate Court judge and a Univ. of Chicago law professor, said in his 1992 Sex and Reason that America, alone in the world, was heavily influenced by both Catholicism and Puritanism. He cited Catholicism's strict rules and lax behavior, and Puritanism's lax rules and strict behavior.
Another influence, I believe, is American capitalism's cruel "don't give a damn about…