Is It Possible Not to Be Predisposed to Addiction?

True or false: An addictive personality is a myth

I just finished reading Transcendent Kingdom by Yaa Gyasi. In the book, the protagonist’s brother overdoses after being addicted to opioids for three years. The protagonist goes on to pursue a Ph.D. in neuroscience, and her main experiment is on mice. She gets the mice addicted to Ensure, which…