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Let's say that the original person who first had the Plague of Justinian, whether it's Yersina Pestis, in the form that caused the Black Death, some other strain now extinct, or an entirely different pathogen, dies before he or she can pass it on to another person. let's say that it doesn't spread to Europe and the middle east. What happens?
  • What effect does this have on the Anglo-Saxon conquest of England? Do the Roman-Britons survive? Do we see a three-tiered society, with the Anglo-Saxons on top, the Roman Britons in the middle, and the full britons at the bottom of the heap?
  • How does this effect the conquests of Justinian? Does he continue campaigning in Visigothic Spain and the south of France?
  • What effect does this have on the Arab conquests? Does the lack of a plague give the Byzantines and Persians the ability to resist the Arab invasion, even if a Mohammad-analogue appears?
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