As the title of his book — Drink? — suggests, world-renowned professor of neuropsychopharmacology David Nutt thinks the cost/benefit analysis around consuming alcohol is an open question. He's not anti-alcohol — he regularly drinks himself — but he also thinks most people (more than 2/3 of folks around the world have had a drink in the past year) need to understand a lot more about drinking than they typically do in order to make an informed choice as to whether, and how much, to partake.