As you might expect, that total number of dead people has grown a lot over time. The U.S. Census Bureau has collected several of the sources for historical world population rates. The estimates differ for two major reasons — the demographers don’t all agree about which date to take as the starting point for human life, and they also estimate population growth differently...
Most of those people who have been born are no longer with us. What’s really fascinating, though, is how the dead-to-living ratio is expected to change in the future. By 2050, the world’s population is expected to grow to 9.7 billion. Which means that in 35 years’ time, the living would make up 8.6 percent of those who have ever been born. And the dead would outnumber the living 11 to 1.
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