What are chiefly responsible for having generated this extraordinary order, and the existence of mankind in its present size and structure, are the rules of human conduct that gradually evolved (especially those dealing with several property, honesty, contract, exchange, trade, competition, gain, and privacy). These rules are handed on by tradition, teaching and imitation, rather than by instinct, and largely consist of prohibitions (‘shalt not’s’) that designate adjustable domains for individual decisions.