Guns Germs And Steel Summary

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Chapter nine in Guns Germs and steel goes to describe how and where many of the domesticated animals in history came from, and how many of the larger species could not be domesticated and why. He uses the analogy of the Anna Karenina principle, that there are many reasons why an animal could be undomesticable, but in order for an animal to be domesticated, it must fit a multitude of requirements for it to be advantageous to use it in this way. He specifically refers to large animals, those over 100 pounds, and of those, only five species were used worldwide, and nine were used in specific geographies, this out of approximately 148 candidates throughout the world. Diamond then describes why most (13 of the 14) of the domesticated animals came

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