Gregariousness

Yesterday I was watching this interview to Rita Levi Montalcini, nobel prize for medicine (studiying human brain), almost one hundred years old. She's also an honorary member of italian Parliament. She is a Jew, born in Turin.
http://www.youtube.com/watch?v=R8peqvI-E4Q&eurl=http://dinovoisrock.blogspot.com/2008/11/rita-levi-montalcini-tempo-che-fa.html

She answered this question (free translation):
Interviewer: "As regards the tragedies of this century, you wrote "Man is not evil, he is obedient""
Montalcini: "Man is gregarious. This goes back to the begin of life of Australopithecus. Man is a fossil which takes with him the memory of the past. The origin of the evolution of man, derived from when man was emotively guided, was gregarious. There was not the gene of evilness, there was the gene of gregariousness-compliancy. Man was not born with the need to commit evil deeds. He commits evil deeds because he is gregarious, he passively accepts - we know this from totalitarian regimes - the order of the so-called boss"