I read Guns Germs and Steel along with another book, 1491: New Revelations of the Americas Before Columbus by Charles C. Mann. Both books present a similar theory, that disease was a major contributing factor in the decimation of indigenous Americans. But Vikings were the first Europeans to arrive in the Americas, did they also introduce disease? Why wasn't it as devestating?
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Native Americans and (European) Diseases
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What would these diseases be?
I've wondered why the disease transmission wasn't the other way around?