"...national narcissism parallels individual narcissism as a predictor of interpersonal aggression and retaliation if the narcissist feels threatened, unadmired, or unrecognized."
Rather surprisingly, Americans are rather modest, compared to the Indians or Russians.
Interesting, and telling for a country's nationalism. Not at all accurate for history. That would take a generation by generation look at an area since at least measured history. Much of the voting now is on about a hundred or so years, except, most likely, in the East where people think back eons.