The brain produces endorphins - "endogenous morphine" - naturally. I've wondered if some peoples' brains produce less of the goodies than others' which would make those deficient in endorphins more likely to succumb to opiate addiction. Never seen any discussion on the topic.
But, that said, I don't think I'm buying the author's thesis: "This means that alcoholism, drug addiction, eating disorders, suicide attempts, phobias, adhd, anxiety and depression, et al are all disorders of the brain and as such need the treatment of a medical doctor first." There's been a huge rise in rates of all these addictions and disorders over the past decades so I think the primary cause is the sense of alienation of modern humans. We're estranged from nature, the clan and the community; until we realign our relationships with each other no other treatment is going to be more than a temporary fix.
