A Belgian writer once remarked to me that he was surprised when he moved to the United States. Compared to everywhere else, Americans were so angry at each other all the time.

He postulated that because America was founded on two great crimes - genocide and slavery - and was instilled with the myth that rugged individualism creates success, generations of Americans have been screwed out of the opportunity that they are led to believe is their own, all while blaming themselves for all their misfortune, or others for stealing their opportunity, hence the anger.

I don't know if that cultural trait will ever depart the American psyche.