Even Africa's rateAs your citation states, fertility rates are well below replacement in Western Europe, Anglo America and China ... and India is getting better ... the main problem today is in Africa, folks there have no retirement systems so they rely on a dozen kids to support them in their dodderhood ... wouldn't you? ...
The good news is that if we don't control our population ... something else will ... that's just how biology works ...
Sigh. Its just an exercise to show how much of the earth people take up. Look at a globe the size of a basketball, and most likely Rhode Island wouldn't even show up.Um.... I did the math.
The question is (or should be) how many could live in a certain area, not how many could "fit".