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I'd read some years ago that about 100 billion homo sapiens have lived, including those 3 billion of us who were alive at that time (late 1960's or early 1970's). I am wondering how much validity such speculations may have, and if modern research (and speculation) has refined this estimate. Thanks! I hope someone will be able to contribute to answering this interesting question.

The link below seems to substantiate that view.

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17y ago

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