It is too early to evaluate the impact of WikiLeaks on world affairs. But more than ever in this changed and more porous world, Woodrow Wilson’s call for “open covenants, openly arrived at” remains a superior guide to foreign policy to Machiavelli’s recommendation that governments be strong like a lion but also clever like a fox. It may be that WikiLeaks goes too far, but enlightened policy makers should welcome publication of how good decisions—and bad—came about.