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Take a Guess: How Many People Have Ever Lived on Earth?

Posted to Gurteen Knowledge-Log by David Gurteen on 23 February 2016

 


Title

Take a Guess: How Many People Have Ever Lived on Earth?
WeblogGurteen Knowledge Log
Knowledge LetterAppears in the Gurteen Knowledge Letter issue: 188
Posted DateTuesday 23 February 2016 12:12 GMT
Posted ByDavid Gurteen
Linkshttp://www.prb.org/Publications/Articles/2002/HowManyPeopleH ... 

Have you ever wondered how many human beings have ever lived on earth? Go on take a guess. And what percentage of those people are alive today?

This page on the Population Reference Bureau website does it's best to make a sound estimate and explains the rationale in some detail.

It surprises me just how small the total is and how high the percentage that are alive today.

One sobering fact is that "Life expectancy at birth probably averaged only about 10 years for most of human history." So much for the "good old days".




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