this topic is large and easily misunderstood. No absolute statement covers all. therefore all absolute statements are untrue. People originated as tribal groups, most of them fought violently over territory at times. Meanwhile "religion" is always present, but in varied forms. The stratification and codification of "religion" and The State occurred in different ways in different cultures, but it is certainly a compromise between active violence and active spiritual traditions, in a society. You can say "people who claim to be ReligionX used violence" and it means more than one thing.