In 1968, Paul and Anne Erlich published “The Population Bomb,” warning against overpopulation as a primary cause of both short-term and lasting degradation of the quality of life for all on the planet. Global population was then 3.5B (Billion) and annual growth was 2.1%. In a 2018 reaction to criticism of that and later publications, they expressed the wish that they had emphasized overconsumption and unequal distribution of wealth more than the size of human population. Still, population had more than doubled by then to 7.6B, while the rate of growth had shrunk to 1.1%. Additional estimates have been made, using the decreasing rate of growth. For example, at the close of 2022, global population stood at 8.0B with growth slowing to 0.8%, and an estimate of population in 2030 based on that decreasing growth rate is 8.55B at a rate of 0.8%.