After the Great Pandemic has passed and we emerge from Great Depression II, what will be America's mission in the world? What will be America's cause? We have been at such a turning point before. After World War II, Americans wanted to come home. But we put aside our nation-building to face the challenge of a malevolent Stalinist empire dominant from the Elbe river to the Barents Sea. And after persevering for four decades, we prevailed. What, then, did we do with our epochal victory? We alienated Russia by moving our NATO military alliance into the Baltic and Black Seas....