A couple of weeks ago, Slate.com published a very interesting article on “the Letter of Last Resort“, a letter contained inside a safe inside a second safe in the control room of nuclear armed British SSBNs. This letter, hand written by British Prime Minister Gordon Brown, contains instructions for the submarine’s commander on what to do in the event the British government is obliterated in a nuclear attack.
The article raises some interesting points about Mutually Assured Destruction (MAD), the Cold War idea that one nuclear power would not attack another for fear of a retaliatory strike. Nuclear weapons systems were set up in a way that made it difficult/impossible for one power to destroy a rival’s capability to retaliate (think nuclear armed submarines hidden in the ocean depths, or nuclear bombers ready to fly at a moment’s notice). The threat always was: nuke us, and we’ll nuke you back. The letter of last resort is a relic of that idea; even if London was destroyed, the Prime Minister could order a counter-strike.
But would he/she? One particularly interesting point discussed by the article concerns the ethics of MAD: would leaders, knowing that their own country was about to be destroyed in a nuclear attack, be able to order a retaliation? And would doing so be ethical? A former British defence secretary is quoted as saying “I realized I would find it very, very difficult indeed to agree to use a nuclear weapon—and I think most people would.” After all, if a nuclear strike was incoming, MAD had already failed… would killing millions more people have a point?
Another interesting point addressed by the article concerns Christian and Jewish thinking on nuclear retaliation. Generally, both feel that threatening rivals with nuclear destruction as a means of preventing a nuclear attack is permissible; actually acting on that threat is not.
The paradox of MAD.