A poster to ycombinator looked at birthrates and living standards to draw the conclusion that rising living standards will drive the world to a population peak in 2065 Nextbigfuture disagrees with the projection for population and also disagrees with the assumption of perpetually dropping birthrates.

Why World population will likely be higher than 9.75 billion in 2050

1. The UN has been revising its population projections higher for the last 15-20 years. They have kept expecting the birthrate in Africa to decline faster than it actually has

2. The population census in African and many other poorer countries tend to be out of date. Which means the most recent census is old and inaccurate. This tends to mean an undercount. China likely has an undercount of 10-30 million because of the second and third child being hidden because of the one child policy. World population is likely already 7.5 billion now and not 7.3 billion.