Elders and Interdependency
To understand human nature, it's useful to think in terms of evolution. Why would a species need elders or have an interdependency with them? For example, what is the benefit to a species of having the females live a long time after being able to have children? Or for males to live a long time after their peak fitness levels? Fitness in nature is a tradeoff between costs and benefits. Maybe fitness isn’t just about physical fitness, but also about non-physical fitness.