Bigger than the United States

“Sub-Saharan Africa’s population is set to double over the next 30 years…and putting it on track to overtake central and south Asia soon after as the world’s most populous region”

https://www.ft.com/content/868e20d0-90ec-11e9-b7ea-60e35ef678d2

Nigeria population alone is expected to reach 400 million by 2050. On the positive side its much better that population is growing in a country that has a low ecological footprint than in USA. On the negative side let´s not forget the terrorist implications https://pacheco-torgal.blogspot.com/2019/09/2019-paper-by-german-researchersincome.html

And also about how ISIS (Islamic State) is expanding in Sub-Saharan Africa

https://edition.cnn.com/2019/02/14/africa/nigeria-gov-boko-haram-attack-intl/index.html

https://www.defenceweb.co.za/security/national-security/the-arrival-of-isis-in-southern-africa/