Well, it is clear that African and Middle Eastern countries have the largest fertility rates, the first world has the lowest, with South Korea being almost near catastrophe. Latin America, which for years was very fruitful, is mostly below replacement rate, and will probably be near the same birth rates of Europe soon.
While it is true that the most advanced economies have the lowest fertility rates, I wouldn't brag about that as an accomplishment. Some here (and in other places) tend to suggest that the reason for the low fertility rates by the more advanced and civilized citizens of the first world is due to the fact that they are economically prosperous and are much more conscious, cultured, and aware of the world needs, therefore they reproduce less, whilst those more primitive individuals in the underdeveloped world, who are ignorant and oblivious to the current world and climate catastrophe, keep reproducing without control. This is of course not the case. While there is of course a cultural element to it, the truth is that the flooding of birth control, the destruction of the family by global institutions, and the normalization of abortion in the most advanced economies, have created the idea that children are disposable and a nuisance, that the worst thing you could do if you are a woman is to be a mother, and if you are a man, to be a father, because you will be destroying the world; besides, children and a family are so passé. Simultaneously, to add a bit more of irony and confusion, while they preach that you shouldn't have children, they use phrases like "What kind of world will we inherit our children?".
At the same time, and I have mentioned this before, the African countries which have so much need of many things have also been flooded by birth control and abortion clinics. The Bill and Melinda Gates foundation have invested so much resources on directly sending birth control to Africa. Really, is birth control the largest problem in Africa? Should a so-called philanthropic organization focus most of their resources on keeping those Africans from reproducing or are there more pressing issues that should, perhaps, be attended first? My best guess is that these people (who ironically love to scream 'racist' at everyone) prefer the Africans to stop breeding rather than feeding them or providing them with education, medicines, or anything else.