Early relationships with your parents have a profound impact on your health and outlook on life

If the child really is father to the man, then it's reasonable to ask: Why is that true?

This is not a simple question. But research from the Harvard Study of Adult Development allowed me to link childhood environments with men's lives in old age. The project, commonly known as the Harvard Grant Study, is the longest longitudinal study of human development ever undertaken. Begun in 1938, it has charted the emotional and physical growth of more than 200 men, starting in their undergraduate days at Harvard University.