No, the answer is simple: Gods aren't real, and war is less effective than working together.
This planet is small, but the universe is big. It's big enough for us all, and if we REALLY work together, we can perhaps colonize another planet, giving us access to HUGE amounts of resources, if given time to develop.
We just need to find a reason to see love in the world, instead of hate. We need to find reasons to work together, instead of killing each other. That's all there is to it.