‘In an influential article published last April, Andrew Krepinevich argued that we are entering a new nuclear age. China, he said, is ‘upending the bipolar nuclear power system’. That world was dangerous enough, but a world of three major thermonuclear powers could be much worse. ‘In a tripolar system,’ Krepinevich argued, ‘it is simply not possible for each state to maintain nuclear parity with the combined arsenals of its two rivals.’ Any attempt to do so would likely result in an uncontrolled arms race, increasing the chances of a catastrophic war.
Think of the three body problem in classical mechanics. The interactions of two masses are relatively easy to calculate, but three are unstable and chaotic: there is no easy equilibrium. Nuclear armed states create a similar dynamic, a three bomb problem….’ ( Tom Stevenson via The London Review of Books )
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