I understand your point. Since states developed slowly centered on the development of agriculture they are historically only about 6000 years old.  Does that mean there was no slaughter, rape and pillage prior to that?   Social Scientists believe the formation of states developed as a means to protect a groups excess production of foodstuffs. So the state came into being to protect itself from theft and aggression by stateless  tribes.  My point is that mankind and his agggressive nature predates all of civilization.  Nihilists believe the state is the culprit and want a pre-state world. But man himself is the culprit. The state was built as a defense against man’s nature.  
What is interesting is that the state became the dominant social structure and would expand by subjugating stateless people’s.  
That is my take anyway.