There was a noticable (and well recorded) change in the climate for awhile when Ghenghis Khan went on his rampage. And he was a lot less effective at killing people than novel old world diseases.

It doesn’t seem completely implausible.

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oezi 3 hours ago | parent [-]

Correlation vs causation?

	▲	lazide an hour ago \| parent [-]
		Not sure how you could run an A/B test on the planet, really.