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    This Is Why America Needs Tons of Nuclear Weapons

    There is a widely acknowledged gap between policy making and academic theory. As Paul Nitze once observed:
    Most of what has been written and taught under the heading of “political science”by Americans since World War II has been contrary to experience and common sense. It has also been of limited value, if not counterproductive, as a guide to the actual conduct of policy.
     
    This gap is especially pronounced in the realm of nuclear strategy. In academia, nuclear scholars have consistently argued that nuclear-armed states only need a limited number of warheads to maintain a secure second-strike capability, and building larger arsenals is of no utility. During the Cold War, however, the Soviet Union and United States built tens of thousands of weapons, and Moscow and Washington still maintain arsenals well in excess of what academics believe is necessary. In seeking to explain this gap, most scholars have fallen back on the argument that the superpowers are simply acting “illogical” when it comes to nuclear strategy.
    Matthew Kroenig seeks to bridge this gap in his new book, The Logic of American Strategy: Why Strategic Superiority Matters. A professor at Georgetown University, Kroenig often takes controversial positions and challenges the conventional wisdom, especially the conventional wisdom in the Ivory Tower. In doing so, he makes his points so persuasively that even his staunchest critics are forced to grapple with his arguments.
    The Logic of American Strategy is arguably Kroenig’s most ambitious project yet. The book challenges the conventional wisdom on U.S. nuclear strategy but does so from a position firmly grounded in the work that came before it. Thus, Kroenig accepts that a secure second-strike capability is sufficient for deterring most conventional attacks, but “argues that military nuclear advantages above and beyond a secure, second-strike capability can contribute to a state’s national security goals.” Most notably, his “superiority-brinkmanship synthesis theory” contends that by building a robust nuclear posture—“with capabilities designed to limit damage in the event of nuclear war”—the United States enhances its ability to take risks in nuclear crises. That is because America has counterforce capabilities—i.e., those that can take out an adversary’s nuclear arsenal—that reduce the level of destruction it would suffer in a nuclear attack.
    Again, this is rooted in the pioneering work of intellectual giants like Thomas Schelling. As Schelling demonstrated, in a world characterized by Mutually Assured Destruction, countries are less likely to fight wars. In their place, countries compete through brinkmanship, where each side takes increasingly risky actions in an effort to get the other side to back down. Brinkmanship is a battle of resolve, and most theorists believe that whichever side has greater interests at stake will demonstrate more resolve. That is, they will be willing to take the most risky actions in order to achieve their ends. This presents a paradox for the United States. As the only country that provides extended deterrence over its allies in theatres like Europe and Asia, it almost always has less at stake than adversaries like Russia and China. Thus, if resolve is simply a matter of which side has greater stakes at risk, America should lose every time.
    Why doesn’t this happen, then? Kroenig argues that resolve is about more than what interests are at stake. Similar to Daryl Press’s theory on credibility, Kroenig argues that resolve is better calculated as a combination of the stakes involved and each state’s capabilities. By building a robust nuclear force, America’s losses in a nuclear war—though extraordinary—will be less than its adversaries. This makes U.S. leaders more willing to gamble in nuclear crises than they otherwise would be. As Kroenig puts it:
    Leaders in nuclear superior states still badly want to avoid a nuclear exchange, but because the costs of a nuclear exchange are relatively lower, we should expect that they will be willing, on average, to hazard a higher risk of disaster than their nuclear inferior opponents, making them more likely to ultimately win nuclear crises.

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