You seem to be confusing traits of individual competition (and even physical violence) with large scale organized war phenomena among increasingly larger and technologically advanced groups.
The logic that says that the latter follows from the former is simply not there. Social organization varies enormously in time and space and it takes a lot of "cultural bs" to get to a society that celebrates organized war and considers it inevitable.
The logic that says that the latter follows from the former is simply not there. Social organization varies enormously in time and space and it takes a lot of "cultural bs" to get to a society that celebrates organized war and considers it inevitable.