Joshua Rovner’s Strategy and Grand Strategy offers a sharp analytical lens for understanding why states so often fail to connect military action with long-term security. The book begins from a deceptively simple premise: strategy and grand strategy are not the same thing, and confusing them leads states into avoidable crises. Strategy is a theory of victory, an explanation of how force will deliver political results in war; grand strategy is a theory of security, a blueprint for how military, diplomatic, and economic instruments should create a stable order after the war is over. Conflating the two risks winning battles that ruin the peace, or losing battles that unexpectedly strengthen a state’s long-term position.
Rovner illustrates this through contrasting historical moments. France in the American Revolution achieved strategic success by coordinating effectively with American forces and defeating Britain on the battlefield, yet the financial burden of that victory destabilized the monarchy and contributed to the French Revolution. Britain, by contrast, suffered a humiliating strategic failure in the same conflict, but that loss forced a reconsideration of priorities and ultimately led to an imperial revival anchored in naval dominance and offshore balancing. These cases show that a battlefield outcome is not a proxy for long-term security; strategic success can destroy the foundations of grand strategy, while failure can enable renewal.
A similar tension emerges when examining the Peloponnesian War. Athens and Sparta each possessed a coherent theory of security—Athenian naval supremacy and Spartan land power—but both abandoned confidence in their own advantages. This loss of grand-strategic self-belief led them to embrace unrealistic strategies that promised quick victory without risking a direct confrontation with the enemy’s center of gravity. The result was not decisive triumph but a long, exhausting war that eroded both states’ power. Here, Rovner shows how strategic fantasies flourish when grand strategy becomes uncertain, and how deterrence can fail even when the balance of power should logically produce stability.
The book then reframes contemporary debates. Vietnam demonstrates how a war can become unwinnable not because of tactical mistakes, but because policymakers lack a shared understanding of what “victory” would mean within a broader theory of security. Nuclear weapons reveal a similar contradiction: at the level of strategy, they appear too destructive for rational use, yet at the level of grand strategy states continue to expand arsenals and plan for coercive leverage. Rovner suggests that these inconsistencies persist because states pursue strategic tools that their grand strategy cannot logically sustain, a pattern visible from the Cold War to the post-9/11 “forever war” model of counter-terrorism.
Finally, the discussion of emerging technologies—cyber operations, AI-enabled systems, and information warfare—captures a recurring cycle in strategic history: early optimism, fear of falling behind, and eventual recognition of operational limits. Technological breakthroughs can reshape the conduct of war, but they rarely eliminate friction, uncertainty, or the political questions that grand strategy must answer. Modern powers risk assuming that technological superiority will produce fast, decisive outcomes; the book warns that victory in the information domain may not translate into lasting security if the strategic aims are not anchored in a coherent post-conflict order.
In the end, Rovner’s argument points toward a sobering conclusion: states fail not because they misunderstand war, but because they misunderstand the relationship between war and the peace that follows it. Strategy can win a campaign, but grand strategy decides whether that victory matters. The central question for any state, past or present, is therefore not “Can we win?” but “What would winning even mean—and are we prepared to live with the consequences?”