I encourage you to explore the early history of the pre-Roman Empire peoples. These were largely mythologies that the romans retroactively constructed for themselves (i.e. they had the opportunity to omit the raping and kidnapping in retellings, but chose not to).

It’s full of “and then tribe X invaded and the land of Y, took their women and enslaved their men”. Back and forth for centuries. This behavior was cyclical, inevitable, and universal, until violence was monopolized and institutionalized.

We’ve come a long way, I guess. Still have work to do.