ONLY THE STRO...RESILIENT....SURVIVE !
Resilience, the mental grit and will to endure and overcome tragedy and trauma to come back and fight another day is a biological trait. Resilient people have better brains ( or practicing "Resilience" may make your brain better....chicken-egg, egg-chicken... ).
The always superb Eide Neurolearning Blog
has the details on brain function and resilience