We have adversaries. We have limits, too. Identify America’s allies and let the world know we’ll defend them, but don’t try to create and defend democracies everywhere. Avoid civil wars. Open our markets on a reciprocal basis. Trade is a great alternative to war; so be very careful about imposing tariffs. They are taxes, and they deprive Americans of the benefit of the economic law of comparative advantage. Democratic party leaders (especially President Biden) insist on buy-America rules; Republicans (especially former President Trump) see tariffs as beneficial to America.