AI and ecosystem change

Human beings take an average of 27 years to mature, leave home, start a separate household, and start having children. In the US, once a household is formed, the average American has 1.9 children. At 1.9 children per household, the US is below the basic sustainable population level of 2.1 children per woman. Despite widespread concern about population growth, we actually have halved our fertility rate (TFR) from 4.5 to 2.4 globally, pushing us under the basic replenishment rate. As humans, we have a long history of continually renegotiating an equilibrium with our environment.