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But most humans by far have existed in the last 200 years. The current mean birth age of all humans ever (50% humans born before & 50% born after) is probably o

But most humans by far have existed in the last 200 years. The current mean birth age of all humans ever (50% humans born before & 50% born after) is probably only like 1950 at the oldest.

CameronNemo 5y ago
Why is that a good thing? Humans, their livestock, and their crops have grown to dominate much of the land. That reduces biodiversity and makes for a less resilient ecosystem overall.
- alexose 5y ago
  At the risk of sounding like a movie villain... anyone who's tried to go to Yosemite on a weekend must agree with this on some level
sharkjacobs 5y ago
That's not really relevant but also not true. A reasonable estimate is that ~105 billion modern homo sapiens have ever lived[1], the inflection point you're talking about (50% humans born before & 50% born after) probably happened closer to 200-300CE[2] [1]: https://pubmed.ncbi.nlm.nih.gov/12288594/ https://pubmed.ncbi.nlm.nih.gov/12288594/ [2]: https://fivethirtyeight.com/features/what-are-the-demographics-of-heaven/ https://fivethirtyeight.com/features/what-are-the-demographi...
- KingMachiavelli 5y ago
  Hmm interesting. Would the number of human-years or human-hours lived be different? Perhaps looking at population/exponential graphs is giving me a false intuition because the birth & growth rates were much higher in the past but the overall growth rate stayed the same. It is relevant if you think that the individual unit of human civilization is a single person.