Praying for an External Shock

The world is reaching a milestone – nominally today – 7 billion people are alive in the world. I suppose there must be some uncertainty about that number; perhaps we have to give or take 100 million or so. It has been estimated that the total number of people who have ever lived is around 100 billion. Thus around 7 percent of people who have ever lived are alive today. That’s an incomprehensively large number.
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