A 15 minute TED Talk featuring, David Ansell, a physician, epidemiologist & health activist who worked for almost four decades in hospitals serving some of the poorest communities in Chicago. Looks at the health disparity between the well-off and the poor — especially life expectancy — and how it is the result of structural violence and injustice. He is also the author of two books: County: Life, Death, and Politics at Chicago’s Public Hospital and The Death Gap: How Inequality Kills. Watch now.