In a perfect world Libertarians would rule and there would be no sin. Since we live in an imperfect world, Libertarians do not rule but sin does. You need rules to stop little annoyances like dumping.
Our founding fathers considered that their (our) experiment in personal freedom required a "virtuous people" for success.
I think you are right that the degree of the experiment's failure; which is considerable IMO, can be equated with the lack of "virtue" or personal responsibility of the people over the years.
Nevertheless, I still consider our founders' ideas of how to run a country the best ones ever conceived; totalitariam governments may have the power to enforce "virtue," but there is strong tendency for evil entities to end up in positions of leadership.