Race and Intelligence

The connection between race and intelligence has been a subject of debate in both popular science and academic research since the inception of IQ testing in the early 20th century. The debate concerns the interpretation of research findings that test takers identifying as "White" tend on average to score higher than test takers of African ancestry on IQ tests, and subsequent findings that test takers of East Asian background tend to score higher than whites. It is still not resolved what relation, if any, there is between group differences in IQ and race.
[wikipedia].

They said black people have the lowest IQ in the world. And if you look at our environment, our leaders, our way of life what they said could be true.

For example, in Nigeria we have crude oil but we take it to them to refine and sell it back to us, we have tomatoes but we take it to them to put it in tin and sachet bring it back and sell it to us... the list is endless. We have the money to open factories in our country that can process all these materials but we are not doing it,even if we do maintenance is another problem, so with this, is their theory true?