The Pulitzer Prize-winning geographer on how COVID-19 should usher in an age of global co-operation. "Strange as it may seem, the successful resolution of the pandemic crisis may motivate us to deal with those bigger issues that we have until now balked at confronting. If the pandemic does at last prepare us to deal with those existential threats, there may be a silver lining to the virus's black cloud. Among the virus's consequences, it could prove to be the biggest, the most lasting — and our great cause for hope." Writing in the Financial Times, Jared Diamon shares his lessons.