The US, UK, Canada and others don't lack the will. The acknowledged "mistake" of invading Irag really set this whole ISIS thing off. All the queen's horses and president's soldiers haven't made an inch in Afghanistan in your longest war.. Millions have been killed, wounded, drowned, dispossessed of home and country. It's sometimes better to talk, talk talk than war, war, war. The US has sacrificed thousands of its best and spent nearly a trillion dollars of its treasure with war. Promising to bomb the shit out of them isn't an improvement.