A second relevant feature of an effective policy (thoroughly tested over the course of history) is building consensus. Policies cannot be imposed in an authoritarian manner or imported from other countries. They should be endogenous to each society as a result of collective decisions with the participation of social groups with different tasks and preferences.
Such a collective decision-making process may take longer but policies designed and implemented by “conviction” rather than by “obligation” or “necessity”, and with a degree of consensus, significantly improve their odds for success, and persistence over the long-term.