On Grand Strategy: Summary & Key Insights

I begin with Sun Tzu and Thucydides because their writing exposes the earliest understanding of that tension between desire and limitation, purpose and possibility. Sun Tzu, in *The Art of War*, teaches that the supreme art of war is to subdue the enemy without fighting. His genius lies in perceiving strategy as psychological — in knowing both oneself and the adversary, and in balancing timing, deception, and restraint. Thucydides, chronicling the Peloponnesian War, reveals the opposite: the tragic outcome of immoderation. He saw Athens, driven by ambition, expand beyond its means, and in so doing, destroy itself. Between Sun Tzu’s prudence and Thucydides’ warning lies the moral space where strategy is judged — not just by success, but by sustainability.

The Renaissance reintroduced strategy to the sphere of human agency. Machiavelli’s *The Prince* is no cynical manual, as often supposed, but a meditation on prudence — on the art of doing what circumstances demand without relinquishing one’s ultimate ends. He understood that fortune is fickle, and that necessity compels hard decisions. Yet he also revered virtu, that inner capacity to confront contingency with creativity. When I teach Machiavelli, I remind my students that power without judgment is as dangerous as morality without realism. Both must coexist for a strategy to endure.