Not to interrupt, want to add that I so agree re exercise, traditional and otherwise. But we must remember he had digestion issues, fear of throwing up which can be a deterrent. Tai Chi might have worked for him.
He makes a notable case for the combination of nature and nurture doing its part, even in the womb which I always thought to be true. The stress hormones of the mother circulate to the fetus. The conflicting parents. Divorce, etc. The article is adapted from his new book My Age of Anxiety recently published. There is too much sitting here waiting to be read, but this is on my list. For now the article still keeps me busy.