Once affordability and accessibility of primary needs like food, shelter, healthcare and education are ensured by the society to all its members, then the judicious use of the same is the responsibility of each individual in the society. Only when individuals practice this kind of judicious use, without compulsion from any regulators, the society will be able to ensure affordability and accessibility of the above primary facilities in a sustainable manner. The strong commitment for the judicious use of resources should be nurtured in an individual from the early childhood onwards. Family and elementary education have major roles to play in this behavior formation and thereby ensuring a calm and pleasant life.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!