Absolutely!!!!

The British were once just as primitive as Africa was. There's no reason whatsoever that suggests that Africans wouldn't have developed.

We may not have figured things out as fast as they did but I assure you Africa would have caught up eventually.

Evolution takes place regardless of what race we're talking about and the same kind of curiosity that caused the likes of Isaac Newton and Thomas Edison to make their discoveries would have most definitely sprung up in Africans.

Also, Egypt is widely regarded as one of the cradles of civilization itself and guess where Egypt is located....yup, you guessed it, AFRICA!!!

It's not a matter of whether or not Africa would have developed, the question is when.