There is a difference between when there are plenty of resources for everyone and when there are not. When there are plenty of resources, it is easy to be generous. Race relations can easily be good; no one worries much about ethnic differences. There is plenty for everyone.
Once we start encountering scarcity–perhaps not enough jobs, or not enough good jobs, then there is much more of a tendency of in-groups to fight against out-groups. It is easy for someone to stir up hatred against some group that is for some reason not to be liked. This can be done by stories fostering baseless aggression. I think this is the problem we are running into now. There no longer seems to be enough to go around. - Gail Tverberg