2021 will be a pivotal year for international order as the world begins to emerge from a devastating pandemic and a contentious period of nationalism and populism stoked and symbolized by Donald Trump. But rather than emerging dominant after a period of great struggle, as in 1945 or 1989, America will face the world with its international reputation in tatters, its polity deeply polarized, and its economy in disrepair. And the Biden administration will be presented with a daunting inbox of harrowing threats and profound challenges.