You mean the “natural decline” that is already haappening.
Correct (except for the spelling), users such as you, OP, and Elon Musk are advocating against that. You're part of a movement called pronatalism.
Also what “upwards mobility” - Capitalism is hell bent in killing us all - the upwards mobility is not the solution here.
I have used the word capitalism exactly 0 times in this discussion, so you have no reason to assume the methods of naturally reducing population has anything to do with it, stupid tankie.