From The Federalist:

Killing the IS requires neither more nor less than waging war—not as the former administration waged its “war on terror,” nor by the current administration’s pinpricks, nor according to the too-clever-by-half stratagems taught in today’s politically correct military war colleges, but rather by war in the dictionary meaning of the word. To make war is to kill the spirit as well as the body of the enemy, so terribly as to make sure that it will not rise again, and that nobody will want to imitate it. (emphasis added)