Interdependence among human beings is the medium through which various social systems transact. The mind of each individual in the society is a connection node. This medium is open to any thing from ideas to commodities. However, civilizations evolve and exist only because a regulatory mechanism forms automatically in the connection nodes (minds), which restrict the transaction of things that are harmful to social well-being – of course, which is highly relative to time and place. However, healthy maintenance of social interactions enhances the quality of interdependence as well as the connected social regulatory system, which in turn ensures a calm and pleasant life.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!