This issue will become unavoidable in a few years. China is preparing to lay down markers for its lunar south pole moonbase. There’s a relatively tiny area of land there that will be extremely valuable (near permanent sunlight & frozen water). As soon as two groups are sharing it, they will be forced to cooperate.
That’s definitely been a trend in human history, but I suspect a better model to predict this will be international aviation. Everyone is forced to use common international standards for safety reasons.