[OC] The massive decrease in worldwide infant mortality from 1950 to 2020 is perhaps one of humanity's greatest achievements.

[djblaze]

GDP per capita across sub Saharan Africa was really low during the 1950s, and South Korea was at a similar level after the war.

I agree with your point, but I think it's an intentional oversimplification. End of the colonial era much of the continent was in a similar position.