Summing up the lesson of Hardin

1) Common goods tend to be overexploited;
2) Appealing to morality and coscience to prevent overexplotation does not work (he sayd that: it is psycologically pathogenic)
2b) on the countrary it focuss attention to social and personal anxiety (etc etc)
He suggest:
3) he suggest clear rules that he cals: mutual coercion mutually agreed upon