Recommended Reading: Mary Addison Hackett reflects on heroin and harm reduction at n+1. “It is clear that no one — no neuroscientist, psychologist, psychiatrist, or physician — can explain what addiction is or account for its contradictions. Tobacco, cocaine, heroin, alcohol, MDMA, amphetamines — are they inherently addictive? Common knowledge suggests they are. But all around me I see exceptions more than the rule, my friends who use, have used, some or all of these drugs, including heroin, casually. I, too, am one of the exceptions.”