What causes addiction?

This video is made with love by Philipp Dettmer, founder of Kurzgesagt. It is adapted from Johann Hari’s New York Times best-selling book: Chasing The Scream: The First and Last Days of the War on Drugs.

Johann Hari is a British journalist. He has written for many of the world’s leading newspapers and magazines, including the New York Times, Le Monde, the Guardian, the Los Angeles Times, the New Republic, the Nation, Slate, El Mundo, and the Sydney Morning Herald. He was a lead op-ed columnist for the Independent, one of Britain’s leading newspapers, for nine years.