Governments, businesses, and individuals around the world are thinking about what happens after the COVID-19 pandemic. Bill Gates, one of our greatest and most effective thinkers and activists, believes the answer is yes. The author of the #1 New York Times best seller How to Avoid a Climate Disaster lays out clearly and convincingly what the world should have learned from COVID-19 and what all of us can do to ward off another catastrophe like it. Here is a clarion call—strong, comprehensive, and of the gravest importance.