The 21st century is reminding of us of some uncomfortable truths. Abroad, recent controversies over the rise of Chinese mercantilism, the specter of Iranian and North Korean nuclear weapons, tensions in the European Union, the calcified Palestinian question, mass migrations, and the resurgence of Islamic terrorism all offer a number of lessons. At home, just as instructive is the strange juxtaposition between Obama’s suave progressivism and Trump’s coarse conservatism.