text: if everyone abandoned monotheism, would there be less war?   no.  humans war because humans are violent, competetive creatures. they fight each other despite religion, not because of it. if they do fight "because" of their religion, this is just one of the many things people fight over, and in its absence they probably would've found something else to fight over.  some hard evidence for you is that there are and have been many societies that are not monotheistic, but war frequently. one example is feudal japan, which was in a state of constant warfare for centuries before any monotheistic religion was introduced. we're talking serious, constant warfare between "nobles" in which great armies of men died, and this went on for centuries. ancient greece/rome also warred without any monotheism in their culture. we also see tribal warfare among tribes who worship multiple spirits/gods. there are many other examples- these are only a few.