War of Necessity, War of Choicepart history, part memoirprovides invaluable insight into some of the most important recent events in the world. It also provides a much needed compass for how the United States can apply the lessons learned from the two Iraq wars so that it is better positioned to put into practice what worked and to avoid repeating what so clearly did not. Indeed, in a new preface to this paperback edition, Haass argues that Afghanistan has become a war of choice. "Doing more militarily may not result in lasting improvements in the security situation that are commensurate with the costs."