What did the social class with the largest number of people contribute to early civilizations

so what this question is saying is just that what do School used to do when they had civil conversations because different schools you should contribute no white no black no white and black together but now American schools are saying that white and black can come together that's so amazing because a lot of kids have black friends a lot of kids have white friends without people coming together for the largest amount like I would say about 100 million people orchids or 10000 million people I contribute this order to the law because now no one knows if Donald Trump will be the president or Hillary Clinton will be the president of mostly people don't want Donald Trump but whoever you get you deserve because if not we will have no president America be just a dump in our life that's why you need to take courage out of someone that is willing to do something for this but my final answer is that I would say 20 hundred million thousand kids contribute this order thank you everyone