Once upon a time, there was a grand and influential foreign policy doctrine. It
was based on some traditional notions about U.S.
statecraft that placed severe constraints on when America went to war. It asserted
that when the United States
used military force, it must do so in overwhelming fashion and only in the
service of vital national interests. For any military action, it counseled the
dispassionate weighing of costs and benefits, recommended that policymakers
have clear, realistic and achievable political objectives, and called for the