Winston Churchill was the greatest statesman of the 20th century, and one of the greatest in all of history. From a young age, Churchill understood the unique dangers of modern warfare, and he worked to respond to them. Though best known for his leadership during World War II, he was also a great defender of constitutionalism. A close study of Churchill’s words and deeds offers timeless lessons about the virtues, especially prudence, required for great statesmanship.