I think, for one, we have to really accept that anger is a normal human emotion that can be a positive force for change.

I think what I learned in research is that as Americans, we're very distrustful of anger. We're not sure if we should repress it. The idea that anger is supposed to be controlled is American, and we try to keep it out of our homes.

I do think anger is so difficult for women. Girls think it undermines their femininity; it's not very ladylike.

We are taught to believe it's bad to be angry, or at least it's not good. That's not the case all throughout the world. People are more open and not embarrassed about it. For instance in Paris, people believe Americans have a really unhealthy relation with anger. They think it's essential to get angry.