Many martial arts are spelled with the Chinese character "tao" (道 - read "dou" in Japanese). This isn't a coincidence. They emphasize the fact that martial arts is more than simply a means to kill someone, but is a means to master yourself and kill the evils of society (mentioned in Katsujinken, Satsujinto). The person who learns them simply to kill others isn't a martial artist, they're merely a killer. Martial artists are different by merit of their focus. They practice not so that they will be able to kill others should the need arise, but so that the need will never arise. Someone mentioned Musashi and Sun Tzu in their post. One thing that was left out is that both Musashi and Sun Tzu, invincible men in their time, argued *against* the use of force, always citing that physical combat be the final alternative. When you encounter a fighting system that doesn't account for this possibility; that doesn't incorporate the value of things greater than mere survival, then what you have is just another weapon, and not something that deserves the characteristic of "martial art".