I sort of agree. I think squabbling started many, many times throughout history, but our recent, more comfortable situation allows the same sort of squabbling to go a lot farther before it exhausts the space available.
Now that so many of us live so far from the knife-edge of survival, there are survivable niches for a colorful and mind-bogglingly diverse ecosystem of interpersonal conflicts, including some incredibly specialized ones. The few niches in pre-civilization would favor squabbles that more resemble a frozen tundra than a coral reef: abundant tiny squabbles that keep their heads down and grind away come hell or high
water, and a few large no-nonsense conflicts that moved fast and could overpower almost anything.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.