I don't disagree that the planet is overpopulated. 1.5 billion sounds about right. But I see levels falling way below that. I am assuming thing like worldwide wealth and other assumptions in my android scenario. It is easier to have a relationship with an android that does what you want when you want and I think most people will choose the easy route.
If Russia stops fighting, the war ends. If Ukraine stops fighting, Ukraine ends. Slava Ukraini!