If I might just jump in late here...To be frank, I think the first two chapters here are interesting, but I'm bothered by the author's lack of references. My apologies if I've simply overlooked them, but I see no citations offered as proof of his axioms, nor any that even provide evidence in support of them. He seems to feel his statements require none, but the human mind too easily accepts conclusions to leave the evaluation of an argument in its entirety up to one's own intuition. All premises require reasonable proof, otherwise the conclusions can't be trusted.That said, I think it's much more likely he just didn't want to bother and was writing more for the pleasure of it -- which is fine, who would want to bother, really. That and I don't actually disagree with his conclusions or the argument as a whole. I do, however, question his statements about the overall efficacy of addicted medical professionals. I just don't feel that it's necessary to include that in order to justify his conclusions -- I think the best (and frankly the only truly acceptable way) to approach morality is from a position of maximizing the self sovereignty of all individuals in a society. Basically, preference utilitarianism, as in the modern take on John Stuart Mill I believe (but to be honest it's been quite awhile).I've been diagnosed with ADHD, which depending on who you ask may mean that amphetamines have an almost totally different effect on me than on a "normal" individual. Still, since I've been an addict for years and generally don't mind being honest about it, I thought I'd speak up. Really I can sum up my entire response as: yes, in my experience, he's right but severely downplays how much productivity can suffer.The long version is that I definitely do not function as well as I would if I were not addicted to the only medication that's truly effective at treating my disorder. I may or may not function as well as I would in the total absence of amphetamines... frankly I don't know the answer to that. Even when I abstain for a week or two (only happens if I'm forced to), I can't separate my dependence on the drug well enough to judge.Still, I think amphetamines in particular warp his argument somewhat. Their daily abuse is somewhat unique among the popular drugs of addiction in that long-time addicts tend to exhibit the effects of almost constant exhaustion and severe malnutrition. Personally I eat a healthy diet and take vitamins, but sleep is not something I get very often. That makes it a little difficult to be addicted to amphetamines and still function as a proper member of society, but I can say with certainty it's still possible.Extremely difficult and certainly at a diminished level, but his argument does still hold for them even as he presents it. I guess that means he could cite me as an anecdotal reference... hm :)