Sfb "to no useful end" thats a moot point, do you mean the WWII Bombing? I suggest you read Bomber Boys by Patrick Bishop. Its a good read and gives all the arguments and evidence for both sides. In the end it hastened the defeat of Nazi Germany, but wasn't nice at all. The story of the whole campaign is fascinating.
Obviously in a wider sense it was all pointless but it wasn't as clear cut at the time.