Whatever you think the answer is to the question posed in the title, I'd guess that that your estimate is way off. Mine sure was as I was seduced by a promiscuous factoid. Enjoy!
How Many People Have Ever Lived On Earth? 108 Billion
| Year | Population | Births per 1,000 | Births Between Benchmarks |
| 50,000 B.C. | 2 | - | - |
| 8000 B.C. | 5,000,000 | 80 | 1,137,789,769 |
| 1 A.D. | 300,000,000 | 80 | 46,025,332,354 |
| 1200 | 450,000,000 | 60 | 26,591,343,000 |
| 1650 | 500,000,000 | 60 | 12,782,002,453 |
| 1750 | 795,000,000 | 50 | 3,171,931,513 |
| 1850 | 1,265,000,000 | 40 | 4,046,240,009 |
| 1900 | 1,656,000,000 | 40 | 2,900,237,856 |
| 1950 | 2,516,000,000 | 31-38 | 3,390,198,215 |
| 1995 | 5,760,000,000 | 31 | 5,427,305,000 |
| 2011 | 6,215,000,000 | 23 | 2,130,327,622 |
| NUMBER WHO HAVE EVER BEEN BORN | 107,602,707,791 |
| World population in mid-2011 | 6,987,000,000 |
| Percent of those ever born who are living in 2011 | 6.5 |
Source: Population Reference Bureau estimates.
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