Yes, imagine if no European ever visited Africa at all.
Let's say they found ALL the resources they needed (oil, ore, ivory, diamonds etc) in other areas such as SouthAmerica/Australia and left Africa alone, not even a visit during the 16th, 17th,18th,19th and 20th century... until today.
They would not have invented any Television or similar, they would be secluded to the outside world.
It's thanks to European/American influence that they got cars early 1900.
They would STILL live in mudhuts.
IF Europe/America would have left Africa alone, we would not have Boers, and we would not have Goodrums on the internet