This book cover image released by Viking shows "The World Until Yesterday: What Can We Learn from Traditional Societies?" by Jared Diamond. (AP Photo/Viking)

Associated Press
This book cover image released by Viking shows "The World Until Yesterday: What Can We Learn from Traditional Societies?" by Jared Diamond. (AP Photo/Viking)
This book cover image released by Viking shows "The World Until Yesterday: What Can We Learn from Traditional Societies?" by Jared Diamond. (AP Photo/Viking)
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