will never "win" another war.
Because we (collectively) have abandoned the concept of "Total War" ie. Take no prisoners, scorched earth, and unconditional surrender.
To "win" in theatre a population must be brought to it's knees regardless of non-combatant casualties.
This is why America is in a no-win money sink known as "the Forever War" and why belligerents such as Putin and China shrewdly do what they do.