We approach the end of 2018 to a quickening drumbeat of news articles and analyses heralding the demise of the US as a global superpower, its huge and mounting political economic and social problems and its ever-expanding list of strategic and geopolitical failures far too obvious to ignore. There can be many possible views on what comes next, from a gradual or stepwise descent into depression, dysfunction and insignificance all the way to global catastrophe by way of nuclear annihilation, and there are about as many ways of reasoning about such views, based on macroeconomic models, risk assessment methodologies, ardent belief in Christ’s second coming or on good old-fashioned crystal ball juggling. I would like to propose a different method: of reasoning by analogy. It has stood me in good stead before.
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