With population reaching 7 billion round 2022-2023, and reaching 8 billion around 2043, “severe” (by some’s standards) population control methods, rules and regulations will be in effect by 2050. These regulations will come in the 2030’s. Europe will set up population control regulations is the 2020’s. China already has pop. control regulations in place. Russia will follow along with Europe at the same pace. Africa has been trying and will continue to promote birth control more so in the 2010’s, with a push in 2012, 2013.
If the issue of population is dismissed and not dealt with realistically by the people of this planet moreso than the governments, there’s a possibility that we will reach 8 billion people in 2039, and the earliest being 2036. But, with concerted effort, the 8 billion mark will happen around 2043.