Walter Russell Mead talks about the meaning of an American 'arsenal of democracy' and the challenges of building one for the twenty-first century. They discuss the shifting world order, the war in Ukraine, and the China challenge. They emphasize the need for American leadership against influential great power rivals. They also explore the debate on America's economic potential, misconceptions about American decline, the shift to a work-from-home economy, and the current situation in Ukraine after Russia's invasion. They compare modern warfare to World War I and discuss concerns about production capacity in the United States.