Risk

Does risk-taking contribute to health or longevity? My friend's husband is reading Healthy At 100. It looks interesting. Is offering an opinion risk-taking? An opinion, like this: if a person is going to follow another human to help himself create something, then he might as well try to learn something beneficial from that and then use his work to create a healthier world, forgoing self-aggrandizement and the promotion of apocalyptic themes. That reminds me of the following situation: a little girl being traumatized by a show on T.V. and the grown-ups don't care because they are just too sucked into being entertained. Question: Why are so many people more driven to go for material wealth and reaping external accolades instead of creating a more harmonious environment on the planet?