Birth rates won’t “hold steady” because people don’t die at equal rates. If birth rate is below replacement, old people die off first, the population’s average age goes down every year, and birth rate increases.
A society that is producing children will not die off. The U.S. saw over 3.6 millions births in 2024.
> A society that is producing children will not die off.
This isn’t true. Right now each woman has to produce ~2.3 children for a population with no immigration to replace itself every year. This rate changes but can never fall below two, naïvely. See: https://en.m.wikipedia.org/wiki/Total_fertility_rate#Replace...
A society that is producing children will not die off. The U.S. saw over 3.6 millions births in 2024.