BCE African prehistory first world ~ what does it mean to A.D. believers.

By the end of the 18th century there was controversy about the slave trade, European's primary connection with tropical Africa for the previous 150 or more years. It was a period when the mainstream of European scholarship, was beginning to take an increasingly unfavorable view of non-European socies, and to assert that they had no history worth studying.This attitude resulted from a conjucture of streams of thought deriving from the Renaissance; what's renaissance? To be born again, enlightenment. That trend of thinking build upon what they regarded as a unique Graeco-Roman heritage, European intellectuals persuaded themselves that the purpose, knowledge, power and wealth of their society were so strong that it must prevail over all others; therefore its history was the key to european understanding, and the history of all other societies was irrelevant. This attitude  was perhaps especially applicable to Africa, since Europeans by now hardly knew Africa or African at all outside the context of the slave trade, while the operations of the export slave trade were creating increasing social chaos in many part of the continent.