@JaneyGee
You say “birth rate” but you must mean “net population growth”
Birth rates are falling globally and have been for 2,000yrs from a record height of 8.0 in Ancient times to 6.0 during the Renaissance to 4.0 post 1750 modern times to 3.5 in 1950 to the current 1.8 as of 2023, which is below the replacement rate of 2.1.
Birth rates have been falling everywhere, albeit at different rates. Global population growth is not due births, but due to fewer preventable deaths.
The reason population exploded for centuries was due to everyone living longer, especially infants and children NOT due to “record high birth rates”.