Today marks the hundredth anniversary of the signing of the Treaty of Versailles. Though the treaty ended World War I — supposedly the "war to end all wars" — it practically ensured future conflict and charted a course directly toward World War II. A century after its signing, it remains an object lesson reminding us what kind of disasters lurk when self-righteous progressives, who think they can run the world, get their hands on the levers of power. The basis of the treaty was the progressive internationalism of college professor–turned-president Woodrow Wilson. Wilson had only two years of political experience...