Incorrect, there is very little evidence of people dying by one anothers hand in the iron age. Most people were concerned with getting food to eat, and making tools. The biggest type of injury in any frequency is when societies move to agriculture, and you start to see injuries from people tripping and hurting their wrists (Colles fractures) - not wounds from war, or fighting- just from tripping on ploughed soil and landing with your hands out in front of you. Sorry if I burst anyone's "rawr, prehistoric man" bubble with that.