Fighting and "superior firepower" will never bring peace.
Two things. One, we currently know of no strategy that will bring permanent peace. Two, somebody is always going to have the superior firepower. So, the question becomes, who do wish should be in that position?
If we were to just lay to waste every country that has issues with us then more countries would have issues with our brutallity and the demolishment of trade agreements that the countries had with said destroyed countries.
The name of the game from here out is learning how to skillfully and surgically remove regimes that don't act peacefully in regards to their neighbors and own citizens. That is, criminal regimes.
If a murderous drug gang set up shop in our own neighborhood, and began terrorizing all our neighbors, what would we want the police to do? Whether local crime, or international crime, it's the same equation. Crime is crime.
We would also need to make changes so that criminals have no reason to commit crime. My thoughts on this are as follows: Nobody robs a bank just because they wake up one morning and decide "Hey! I want to rob a bank!" Usually criminals who rob, pilage, and plunder are down to their bottom dollar and have no other option (in their mind) but to rob a bank or steal money/items as a last result to survive.
The biggest crimes are committed by folks who are already rich.