| Paleolithic Era (from 10,000 to 250,000 years ago) | Agricultural Era (from 200 to 10,000 years ago) | Modern Industrial Era (since 1800) |
Duration of each era, as a percentage of 250,000 years11 | 96% | 4% | 0.08% |
Percentage of people who lived, out of 80 billion total | 12% | 8% | 0% |
Percentage of years lived in each era (reflects changing life expectancies) | 9% | 2% | 9% |