Deconstructing Deterrence

Paul Ingram & Ted Seay

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Since October 7, 2023, the term “deterrence” has circulated with increased frequency. There is one problem: as it is currently defined and understood, deterrence does not work.

The Oxford Essential Dictionary of the US Military defines deterrence as “the prevention from action by fear of the consequences. Deterrence is a state of mind brought about by the existence of a credible threat of unacceptable counteraction.” From this, readers can deduce that deterrence is a state of mind and a product of rational decision-making.

Basing security policy on either of these assumptions is foolhardy. It is challenging to calibrate deterrence. This requires distinguishing enough deterrence, where credible fear of counteraction keeps the peace, from too much deterrence, where credible fear of an opponent’s motives can lead to a preemptive attack.

First, some practical examples. Returning to October 7, 2023, it is possible to say Israeli deterrence failed. Since 1948 Israel has sought to maintain a level of strength and preparedness sufficient to prevent its enemies from planning and executing attacks, using the threat of overwhelmingly force to maintain deterrence against its enemies.

The first major sign of trouble with this approach came in 1968, months after Israel’s defeat of its Arab neighbors in the Six-Day War, when Egypt began preparing a response. This came in October 1973 with Operation Badr, the attack which kicked off the Yom Kippur War. Similarly, Hamas began planning its 2023 attack immediately after a major defeat nine years before in the Gaza War of July–August 2014.

In both cases, deterrence failed years before the actual attacks. Israel’s overwhelming military superiority simply delayed the inevitable response to a situation its adversaries saw as absolutely unacceptable. Israel, overconfident in its deterrent capability, discounted the danger when intelligence assets began to report trouble. Thus, a single-minded reliance on deterrence actually led to future conflict.