Tomb of Hong Quan Fu. Photo Iflwlou拍攝
It seems a warmer climate might be bad, but a colder one is deadly.
Once upon a time, people thought that overpopulation triggered crashes, but in this study by Lee and Zhang the hard numbers suggest instead that it was climate, and of course, it’s not the warmer kind of climate that causes the problems but the colder kind.
Malthusian cycles of population boom and bust aren’t the drivers here (though presumably having a large population means there is little buffer when the deadly cold spells hit).
From NIPCC: Cold Periods caused population crashes in China over the last millenium
…there were 5 major population contractions in China between 1000 CE and 1911, and all of them occurred in periods with a cold climate, when mortality crises triggered population collapses. [Abstract]
How much fun can you have in a long frost? Almost every kind of uprising, pain or plague.
In one population crash, the losses were as high as 49% of the peak. In the face of a 50:50 death rate, “perspective” doesn’t seem like quite the right word.
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