One simple question: what non-renewable planetary resource(s) do you see running out within the next few hundred years and causing dependency problems? More specifically, which such resource(s) might nations go to war over?
.
A few notable exceptions that you should ignore for the purposes of this thread:
- Power (and any fuels used solely for power generation)
- Food
.
A few notable exceptions that you should ignore for the purposes of this thread:
- Power (and any fuels used solely for power generation)
- Food