mbriant, that definition is partially correct, but you have to add the intent to destroy the group. That is integral to the meaning of the word, which was coined in 1943, after the Holocaust. And that's where the acts of the last century differ significantly from the past. The examples you give are not genocide because the Romans had no intention of killing every Jew, just those who were challenging their authority. Nor were they killing them
because they were Jews, but because they were the enemy. The same is true for the other examples; remember that the Western conception of combatants and non-combatants did not exist for much of history. Nor did the idea of being nice to the people you conquer.
Lots of things are called genocide that are not. Take the Khmer Rouge killings, wherein about 1.5M Cambodians were killed or died as the result of actions of the regime. That's not genocide. It's impossible for Cambodians to commit genocide against themselves; rather, that was simply very large-scale political violence. Much the same was the case in Stalin's perpetration of the Ukranian famine, the Turk's "Armenian Genocide," and most other large-scale killings.
The Rwandan violence might qualify since Tutsis and Hutus were generally killing each other simply because of their ethnicity. The various Yugoslav incidents might fit the definition as well, since a primary motive was again ethnicity. Even these cases are hard to distinguish, since, for example, in the Yugoslav case, the violence stemmed from a nationalist political agenda. It's even more difficult to call these cases genocide when each group is killing the other.
The only historical incidence that clearly fits the definition is the one it was made for: the Holocaust. It's clearly different from all the others in many ways besides its scope: the Nazis targetted Jews and other groups for no other reason than their ethnicity. There were no qualifiers.
Anyway, I understand your point that today is not generally more violent than the past. I agree with you there. But I find it very intersting that in the century when "tolerism" is generally thought to have taken hold, we saw for the first time people killing each other for no reasons other than what they looked like, how they spoke, and where they came from.
By the way, when has the UN ever made peace?
kerelybonto