Once again, chunk, you keep missing because you're shooting at the wrong target. Lack of resources is not a "capitalist" thing. Communists and capitalists alike work with limited resources. Since the age of Carthage vs. Rome, power seeks expansion. Monarchy, theocracy, dictatorship, Republic or Soviet - it applies to all. Growth and expansion are sides of the same coin - Just ask Lenin.
The resource that will (has) run out before oil is water. And with it, food. Human existence requires sustenance. We don't currently have the resources to sustain the current population. The crash has started. The best we can do right now is divvy up what we have, but that is not sustainable. What comes next will be devastating.