The higher up the wealth-power pyramid the observer is, the more prone they are to a magical-thinking belief that the empire is forever, even as it is crumbling around them.
How great nations and empires arise, mature, decay and collapse has long been of interest for a self-evident reason: if we can discern a template or process, we can predict when the great nations and empires of today will slide into the dustbin of history.
One of the justly famous attempts to lay out the stages of expansion, zenith, decline and collapse is Sir John Glubb’s 1978 The Fate of Empires. Succinct and deeply informed, Glubb’s essay lists these stages:
The Age of Pioneers (outburst or Boost Phase)
The Age of Conquests
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The Age of Commerce
The Age of Affluence
The Age of Intellect
The Age of Decadence
The slippery slope to collapse–decadence–is characterized by greed, corruption, irreconcilable internal political rifts, moral decay, frivolity, materialism–hmm, sound familiar?
All of this fits the S-Curve model which I’ve described here many times, for example:
But what triggers the collapse of a weakening but still functioning empire? For that, I propose a taxonomy of collapse. A taxonomy is a system of classification that groups organisms or types that share characteristics and origins.
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What taxonomy of collapse does history suggest? I would start with:
1. Bolt from the blue: a fast-moving, unexpected crisis that overwhelms the usual defenses and responses of the empire. An invasion by previously unknown forces with superior technology and/or organization fits the bill: the Mongols in Eurasia, the Spanish in the New World, etc.
Extremely contagious and previously unknown infectious diseases like plague and smallpox are also bolts from the blue, devastating populations with no immunity. It is estimated that 80% or more of the population of North America died from exposure to smallpox and other European diseases, in many cases long before the victims had ever seen a European, as the diseases spread much faster than the invaders themselves.
A drought that never ends is another unexpected catastrophe that quickly depletes food stores.
These bolts from the blue can strike at the same time: one reason why the small-in-number Spanish forces conquered vast empires in the New World was the empires had already been fatally weakened by diseases introduced by Columbus decades earlier.