THEY DIDN’T LISTEN: TOO MUCH GRIFT AND OPPORTUNITY FOR OPPRESSION. The Prophets: D.A. Henderson. Years before Covid, the scientist credited with eradicating smallpox warned against shutting down the world to combat an epidemic.

In 2006, ten years before his death at the age of 87, the legendary epidemiologist D.A. Henderson laid out a plan for how public health officials should respond to a major influenza pandemic. It was published in a small journal that focused mainly on bioterrorism—and was quickly forgotten.

As it turns out, that paper, titled “Disease Mitigation Measures in the Control of Pandemic Influenza,” was Henderson’s prescient bequest to the future. If we had followed his advice, our country—indeed, our world—could have avoided its disastrous response to Covid.

This month marks the four-year anniversary of lockdowns on a global scale. And though the pandemic has passed, its consequences live on. The lockdowns embraced by the U.S. public-health establishment meant that millions of young people had their education and social development disrupted, or left school for good. Mental health problems rose substantially. So did incidents of domestic violence and overdose deaths.

It didn’t have to be that way.

“D.A. kept saying, ‘You have to be practical, and you have to be humble, about what public health can actually do, especially over sustained periods. Society is complicated, and you don’t get to control it.’ ” But they wanted to.