FOR MANY OF us, 2020 has been a very dangerous year. Alongside the usual headline grabbers like wars, violent crime, and terrorism, we also faced more insidious, creeping threats: a pandemic that has claimed more than 300,000 American lives, and the lives of 1.5 million people worldwide, thanks in part to waves of viral lies dismissing Covid-19's deathly serious effects. Hackers who have spied on, attacked, and extorted countless companies and government institutions—including even hospitals—during a global health crisis. And a US president who has sought to fundamentally undermine both the response to the Covid-19 pandemic and democracy itself with nakedly self-serving, corrosive misinformation.