How did humans advance from caveman to this very answer site and still be as prejudicial as they are?

Question

I can see caveman to wagon wheel or maybe even fire, but beyond that, what happened?

Answer 1

Open mindedness and cooperation are not necessarily requisites for progress or innovation.

Answer 2

Perhaps prejudice isn't the negative trait it's so often portrayed to be.

Answer 3

Ignorance and the prejudice that emits from it are two of the most common human achievements.

The good news that while it may be the majority...we ain't all like that!

Answer 4

You are here because your ancestors killed or at least displaced all their competitors.  Long term survival of their lineage required that they make room for their descendants at the expense of someone else.

Answer 5

You think cavemen didn't fight with each other?