Nicholas Christakis is a physician, sociologist and author who has an important message for us all: even in trying times, humans show an innate instinct for good. It’s a case he makes in his latest book “Blueprint: The Evolutionary Origins of a Good Society.” He speaks with Hari about this latest theory. He also explains the importance of social distancing and why it actually works as well as how coronavirus compares to other pandemics in the past 100 years; how the U.S. response fares in comparison to other countries; and how — as a sociologist — Christakis thinks the epidemic may impact us as a society.