It’s easy to feel pessimistic about the state of the world’s health. The perfect storm of crises can seem intractable, from the health impacts of climate change to deadly wars and the constant risk of epidemics and pandemics. Yet despite these challenges, Dr. Gavin Yamey, professor of global health and public policy at Duke, is profoundly optimistic when it comes to tackling disease and improving human health worldwide. He’ll discuss why he thinks every nation could halve its premature deaths by 2050.