Also know that interfering with natural selection in humans is likely to have more consequences than simply fewer humans. There have been many studies about what happens when you make even seemingly insignificant artificial changes to population numbers and the results aren't pretty.
Generally because of constant attempts to flip population numbers (oh no ! too many ! oh no ! too few ! oh no ! too many ! ...) the population numbers start to fluctuate wildly. Then at some point, they hit 0. Whoops.
Keep in mind that if you do seek to reduce birthrate, to have more than extremely small changes in the rates is likely to result in outcomes vastly different from what you envisioned. So far, the most famous of those rate-adjustment fuckups have been with rabbits, cats and kangaroos. If the same happened to people, we'd be in shit so deep you wouldn't believe it.
Generally because of constant attempts to flip population numbers (oh no ! too many ! oh no ! too few ! oh no ! too many ! ...) the population numbers start to fluctuate wildly. Then at some point, they hit 0. Whoops.
Keep in mind that if you do seek to reduce birthrate, to have more than extremely small changes in the rates is likely to result in outcomes vastly different from what you envisioned. So far, the most famous of those rate-adjustment fuckups have been with rabbits, cats and kangaroos. If the same happened to people, we'd be in shit so deep you wouldn't believe it.