Fuck your feelings, snowflake!
It was another thread, and I can't remember the name of the book. But it made this very compelling, scientifically sound argument that we lived relatively peacefully for tens of thousands of years in small bands and tribes. Obviously if some marauders came along and stole your food or women, you fought back. But, per capita, there wasn't much pillaging or invasion. But then we learned to travel and communicate across large swatches of land and sea. With that came organized religion, trade, economic doctrines, and political strife. And the technology for all of the above. And that's when the shit-show started. We found out about not just the next tribe over the valley, but different Gods, different philosophies, different theocratic and monarchical approaches to ruling, and the idea to consolidate power into the few rather than the many. It's only about 5% of our history has done it this way and we have been fucked ever since. Once we could see there were people that looked and spoke and worshipped differently, we've been on a conquest bender ever since.