Questions for theists

[Esquilax]

The claim that "wars are caused by" the absences of alliances?

That doesn't make sense. Alliances typically RESULT from the looming threat of war.
Smaller countries make alliances to guard AGAINST the stronger threat which covets their territory, their food, their women.

This may be a simple point, but what would happen if every group was allied?

See, that's the whole issue; it's those places where the alliances are absent that are the conflict points. All you've really said is that the current level of alliance still isn't sufficient.

It is the selfish, competitive Darwinian mechanism of survival which makes two primates covet the same thing and the only moral consideration is the one which an atheist named Friedrich Nietzsche appealed to. Not God. Self.

And as I've repeatedly reminded you, the survival question with regards to humans is predicated on cooperation, since we're social, herd animals. Actually consider this point, for a second: would we be where we are, in terms of our current ecological niche, without banding together? Would we be the dominant species if we were just a collection of disparate individuals?

You are attributing something to evolution that is not the case, here. Survival of the fittest does not apply solely to the individual.

The Gospel of Jesus, on the other hand, transcends Dawkins and Darwin and Nietzsche and rejects selfishness and greed and the law of the jungle.
Jesus invites us into His divine concept of cooperation.
A threefold alliance - me, my neighbour and God. (Matthew 22:37-39)

Except if that neighbor is of a different religion, or no religion, or gay, or unruly, or a woman who steps out of line, or works on a sunday, in which case you're enjoined to kill them.

I'm surprised I have to keep reminding you guys of what's actually in your holy book!