Neurobiologist Dr. Tobias Esch says later stages of life are a crucial part of the human reward and motivation system. 

His research team has graphed three distinct parts of the motivation system for the neurobiology of happiness in a "U" shape, in which children are at one side, middle agers at the bottom of the U-curve, and the elderly at the opposite. 

To learn more about Tobias's research on post-traumatic growth, watch the complete Omega Conversation with him and Omega board member Manuela Roosevelt here.