This is the title of a WHYY report this week, featuring Penn scientists Chuck O’Brien and Daniel Langleben.  https://whyy.org/segments/what-makes-addiction-a-disease/  For more on this timely topic, be sure to attend the CNS Public Talk next month by Alan Leshner, former director of the National Institute on Drug Abuse, who coined the phrase “Addiction is a brain disease” https://neuroethics.upenn.edu/penn-neuroscience-society-public-talk-series/.