I would like to imagine it would be possible then but even if so for how long?

I imagine our willingness to fight is biologically driven and cooperation as well but only up until a point until you're needs (even if trivial or imagined) are met.

I guess a non-doomer take for unification would be absolute end to scarcity and all basic needs are met then conflict transforms to something else. It becomes violence or the threat of violence to maintain unity as the clear way to keep ones abundance, so important to maintain the end of scarcity that the act of strengthening unity (and staving off scarcity problems) becomes a form of power/appeal.