They really never did anything! They entered the world stage in the 1400's!! There were THOUSANDS of years of history before that. And Ancient world history revolves around the Middle East, Mediterranean and Africa. The MAYANS and Aztec indians were WAY further advanced than the Western...
Its a cultural thing, for me I see another black person and something in me just gets happier, like they understand me. So I feel comfortable and can act anyway I want with them without the judgement. :-)