>The emphasis I would hope would also be for improved negotiation tactics, better resource sharing and goal alignment between groups of people.

The fallacy in the line of thinking that "why don't we all just shake hands, say something nice, and get along with each other" comes from the erroneous belief that everyone in the world just wants peace and material prosperity for themselves and their people. This isn't the case, for countless reasons.

Peace is what you and I want, because we're living in highly privileged lives where maintaining the peaceful status quo (one in which we're on top) for as long as we live is the best outcome for us, and because we have a fairly rational view of life and the world (e.g. we are not convinced that killing a certain people is the only key to an eternity in "heaven", or have bought into some myth of ethnoracial/cultural exceptionalism that needs to be defended by any means). We also aren't emburdened by some great injustice for which we have a burning itch for vengeance (e.g. no one has bombed your whole family).

This just isn't the case for everyone in the world.

Of all things there's a relevant Tumblr post from nearly a decade ago that I often think everyone should consider (in agreement BTW):

"If your solution to some problem relies on “If everyone would just…” then you do not have a solution. Everyone is not going to just. At not time in the history of the universe has everyone just, and they’re not going to start now."

I know a number of people who grew up in extreme poverty who are extremely well reasoned here and others who are extremely spoiled and fortunate who would gladly enter into a holy war.

I don't think you can quite generalize that much.

Additionally cooperation is an evolutionary advantage and world war is a species level threat now that we have nuclear weapons.

I don't believe that everyone wants peace. I believe the people who have the ability to shape policy and invest capital would want peace.

Which I think is also complicated. Kind of harkens back to the cliche that WW1 was caused by old people romanticizing war. Most letters between the heads of states confirmed they were anticipating industrial destruction and death but they felt the pressure to initiate war anyway.

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