I think both martial arts and fighting have changed dramatically over the years. For example, some martial arts have been completely modified to the point that their technique is no longer used in fighting, like Wushu or Capoeira. Wushu is a performance oriented sport like gymnastics and Capoeira is a form of dance. But I think that when fighting becomes a martial art, it either undergoes the following:- - techniques change to become more artistic or aesthetic - the fighter has a lifestyle to go with the training - the fighter has philosophical beliefs towards the strategy/tactics - the fighter has spiritual beliefs with the way the fight is fought or ended There could be other reasons why fighting becomes a martial art, but these are the ones off the top of my head. On an off topic, I also believe "fighters" are missing out on alot in life, whereas martial artists have a more fulfilling life. Kinda like when I see MMA fighters vs traditional martial artists. But that's another topic of discussion.