There is one imperative that is common among all life on Earth: survive. It is ingrained into our core. Makes us get up every day to go to school, work, and in some cases war.
Until people get to a point where they have full security or no fear of death, they will always be willing to sacrifice morals for a bit more life. If that's what we consider barbarianism, then I'm afraid it will be a long time before that goes away.
RE: Humanity - Still A Barbaric Species?