Sunday, August 1, 2010

How many people have ever lived on Earth throughout history and which percentage of people is alive today?

Such estimation is purely speculative and impossible to calculate with some hope of success, not only because there are no data about the demographics in our planet throughout most parts of human history, but also because we would never agree on when to start the count. However, taking into account the speculations about demographics in each period and the birth rates, it can be estimated as follows: in the last 50,000 years, about 107,890,000,000 people lived on Earth. At present, we are about 7 billion people (6,866,900,000), resulting in just 6.3% of human beings who have ever lived on this planet since our species first appeared.


Sources: 

  1. http://www.blogodisea.com/cuantas-personas-vivido-tierra-hasta-dia-hoy/ 
  2. Population Reference Bureau (USA): http://www.prb.org

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