[RetroTechie]

Sadly that's not how it works.

There's maaany possible justificatons for contesting previously non-contested resources. Historic or otherwise, justified or not. And those reasons change over time, change of leadership, economic or climate conditions, or even technological progress (resource previously considered uninteresting suddenly becomes valuable - and thus, often contested). Fairly (?) dividing whatever is contested, doesn't solve that problem.

One fix is to just accept that changing circumstances enhance or degrade whatever piece of the pie you got.

Or to keep 'moving the knives' continously. (Re-)distribution possibly enforced by military power. Oh wait... that is how it works!