Comment by NonContro

IQ is negatively correlated to fertility:

https://www.jstor.org/stable/1972320

The average IQ of the Congo population has been measured between 64-74:

https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.10...

The fertility rate is 5.82:

https://data.worldbank.org/indicator/SP.DYN.TFRT.IN?location...

Population of the DRC:

1950: 12m

2000: 47m

2050: 194m

2100: 362m

https://www.populationpyramid.net/democratic-republic-of-the...