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The numbers that tell the story of humanity'Vital ... If you're thinking about setting up a giant land empire in Asia, you cannot do so without this book ... If only the last Song emperor had had this book by his side, he might have avoided his appalling…

What was the tallest building of the ancient world? Or the average life expectancy in medieval Byzantium? Where did scientific writing first emerge? What was the bloodiest ritual human sacrifice ever? We are used to thinking about history in terms of…