I recently read the Prologue and Introduction to Canadian General (retired) Roméo Dallaire’s “Shake Hands with the Devil” (2003). Dallaire was the United Nations Force commander during the Rwandan Genocide of 1993/94.
Eric has already cited the Bosnia/Serbia conflict, among others - others too numerous to list unfortunately.
From what I understand, the much vaunted Scandinavian countries, also Japan, are relatively pure ethnically, and desire to keep it that way. I am sure there are others.
Huntington’s “Clash of Civilizations” comes to mind, quite naturally.
We geologists labored for more than a hundred years without knowing of plate tectonics, asteroid impacts, large igneous provinces and their greenhouse mass extinction events, snowball Earth events, etc…
Sometimes I wonder if my friends the biologists are not missing something important ?
It seems at times, actually most of the time, that many of my fellow human beings are not related to me, despite our nearly identical DNA. Climate change deniers and conservatives, for example.
I know there are significant differences in the gene’s alleles in each of us, and I wonder if this does not mean we are hard-wired to conflict - despite the best ‘rational’ efforts to live together harmoniously.
Romeo Dallaire was asked if he believed in God. He said ‘Yes, because he had met the Devil’.