While sacrificing personal interests for the collective interest remains to be the most important quality of a family or social idol, the ability to recognize the principles and virtues that cannot be sacrificed and the capacity to negotiate the same successfully within the family or society make the idols distinct from others. It requires strong futuristic vision that is supported by vivid reasoning. The sustained acceptability of the idols shall be decided by the progress that the family or the society is achieved with their support.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!