yes but modern day africa doesn't support proper education systems, which is why their iq is lower.
there are black people in other countries who have higher iq because those countries have better education
You forget though that without slavery, black people wouldn't be in europe or America they would still be in modern day africa that doesn't support proper education systems.
So you can thank the white man with their proper education systems.
So a black L is only smart because of white people.