I do not agree that revenge is the best tactic, even though it is used extensivly in this book. Perhaps on a very small scale (ie your roommate eats your pretzels so you short sheet his bed) it can be useful to deter future agression, but for serious offenses such as murder and rape i dont believe revenge is capable of restoring the victim to his previous state and is therefor unneccesary.  In my opinion, revenge can be most useful for parties not directly involved. for instance i believe that the terrorist attacks on 9/11 was useful to an administration who saw an opportunity to use public support that it had been wronged to push for a military campaign into iraq. Now, since the attacks i dont think there is a majority of people in this country who would agree that they feel better about themselves since the 9/11 attacks as a result of the campaigns into iraq and afghanistan. most people still feel like they had something taken from them and that its an inconvenience to travel and that it is unfortunate the american image has been tarnished abroad. given that revenge is not the answer, i cannot say what the real solution is when terrorism is rooted in ideological beliefs. because revenge is a pretty mortal thing, it does not seem to be an effective deterrent when the culprits believe their souls are destined for a blissful afterlife regardless of whether or not they die a martyr or in battle against the infidels.