I’m reading a fascinating history book by Ian Morris called Why the West Rules–For Now. Morris writes frequently about the role climate has played throughout history.
He writes about the Medieval Warming Period at some length. This is the Medieval Warming Period (MWP) that Michael Mann ‘disappeared’ with his Hockey Stick Chart and was the subject of at least one email to David Deming:
Those who are forced to grudgingly admit that there was a MWP often say it was only regional in nature, confined to a few locations and didn’t occur simultaneously. History says otherwise.
Morris writes in his book, (p. 363) ‘As if these strains were not enough, after 900 Eurasia came under a new kind of pressure–literally; as Earth’s orbit kept shifting, atmospheric pressure increased over the landmass, weakening the westerlies blowing off the Atlantic into Europe and the monsoons blowing off the Indian Ocean into southern…
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Utopia, you are standing in it! 
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