In the book, "The Art of War" written nearly a thousand years ago, author and military general Sun-Tzu proclaims that if one shot is fired, or one drop of blood spilled, that war will have no winner. Negotiations and diplomacy have won more hearts and minds than any war ever has. You can't win a war, however you can be victorious in negotiations.
Being able to "talk things out" can save both parties a lot of trouble, since most conflict are started under misunderstandings anyway. I believe that direct military action should be the result of a failed negotiation, but negotiating should be tried first. This has the potential to save human lives.