Yes, we could, if EVERY country chose not to fight.
And heck, even if only SOME countries had chosen not to fight, we could have avoided WW2, if Britain, France, the former USSR and the USA had chosen not to fight Germany and Japan.
Maybe your right... they have robots now
and there's no such thing as a non-combatant
"By oppression's woes and pains
By your sons in servile chains
We will drain our dearest veins
But they shall be free.
Lay the proud usurpers low!
Tyrants fall in ev'ry foe
Liberty's in ev'ry blow
Let us do or dee!"