England’s leading climate historian Hubert Lamb said people prospered during the Medieval Warm Period, and suffered when the weather turned cold.
Climate, History and the Modern World – H. H. Lamb – Google Books
It should be obvious to anyone with an IQ higher than a turnip, that humans do better in warm climates than they do in cold climates. That is why almost everyone in Canada lives along their southern border, and why tens of millions of Americans have migrated south.
