Every era has its signature economic ratio.
The Second World War was industrial production — the side that could build more tanks faster won, and the United States could build more tanks faster than anyone. The Cold War was missile throw-weight, the race to accumulate warheads and the delivery systems to deliver them, both sides spending treasure they didn't have on weapons they could never use. Every era has its preferred compression of the question: who wins?
The current era has three ratios, and they all point in the same direction.