If you really believe this, let me suggest the book War Before Civilization: The Myth of the Peaceful Savage by Lawrence H. Keeley. It quite irrefutably establishes that almost all primitive societies are far more violent than even those of the 20th century.
The average "primitive society" studied by him had violent death rates at least 10 times higher than those suffered in war during the 20th century.
IOW, if the 20th century had been as violent as the leftists' beloved "wise and peaceful indigenous peoples," 1B to 2B people would have been killed rather than the 100M to 200M that were.
The 20th century killed large numbers of people, but this is much more a function of the high population than of the intrinsic level of violence.
Yes, I suppose you’re right about that.
Maybe what I was really trying to say but not so well was the level of violence has been translated into an impersonal, technical, and assembly-line style of murder of an industrial scale. No clubs or spiked mace from a yard away, etc, but rockets and bombs and artillery, automatic weapons, chemical and biological agents, and of course nuclear fission.