....just a short comment from almost 80... I believe I was "born anxious and slightly depressed" sort of my nature; you can see videos of, for instance, four toddlers... one will be shy, another sad, one obviously happy and the other, well , another personality. I was shy and not a joiner but able to get by as a child, a teen, an adult and now a senior but have had depression on and off and my last yeas on earth are not too joyful... is this possible to be born with a personality trait sort of nature vs nurture?