http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedo... It is estimated that ap

http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx http://www.prb.org/Articles/2002/HowManyPeopleHaveEverLivedo... It is estimated that approximately 106 billion have lived on Earth between 8000 BC and 2002. (The population before 8000 BC is thought to have been too small to count on a scale of billions.) So, it seems that 7% is about right.