Niccolò Machiavelli is one of the most famous strategists of all time. In this collection, he discusses the dangers of conspiracies and the essential parts of an army, which are vital for acquiring and maintaining power in his era. He also provides advice on tactics and discipline and explains why promises made under pressure should not be kept. GREAT IDEAS. Throughout history, certain books have changed the world. They have transformed the way we see ourselves—and each other. They have inspired debates, dissent, wars, and revolutions. They have enlightened, outraged, provoked, and comforted. They have enriched lives—and destroyed them. Now Penguin brings you the works of the great thinkers, pioneers, radicals, and visionaries whose ideas shook civilization and helped make us who we are.