Thats not gonna happen but to be sustainable it woul have to be way lower. When we first started overshooting what the earth could provide in 1970 we where a bit less than that and we have decimated so much we need to have actual healing take place. We honestly should keep it at a billion and get away from the whole factory farming thing. The fertilizer from oil was in the early 1900’s and we were below 2 billion at that point.