Going one level of abstraction higher: there is no evidence that demand/supply dynamics alone will regulate a society over larger populations and time scales. Even the phrase "invisible hand" appears only once in Adam Smith's Wealth of Nations, somewhere around page 500, and that refers not to the market at large, but to the emergence of protectionist behaviours among suppliers within a country.
Laws and regulations are part of the free market system. As rules approach zero, competition approaches war.