here is my 0.02 cents
The 3 Categories of Martial Arts
"When the mind is tethered to a center, naturally it is not FREE; it can move only within the LIMITS of that center." -Bruce Lee.
TRADITIONAL MARTIAL ARTS vs. M.M.A.SPORT vs. REALITY-BASED MARTIAL ARTS
Martial arts can be divided into 3 categories: Traditional Martial Arts, Mixed Martial Arts, Reality-Based Martial Arts. The problem is that, thanks to movies, TV, Internet, You Tube, Instructors, ect., there is no actual proof of any one method of fighting being completely dominant in all situations. Martial Artists have blurred it to the point of non-existence. While all have many overlapping elements, it is important for you to understand that each category is distinctively different and must be treated as such.
TRADITIONAL MARTIAL ARTS Traditional martial arts contain every style from traditional Karate, Hapkido, Kenpo, Escrima, Aikido, and kung fu, to the countless other cultural traditional martial arts that have been developed throughout history. Some traditional martial arts systems originate from military combat experience and self defense needs for people. These systems have been tested and proven under realistic conditions back in the 500 CE era, when they FOUGHT with HONOR, but has not been PROVEN in MODEREN DAY. Things have changed in this world we live in but, none the less, all of these arets are fun to do, help get you into shape, instill discipline, and are great for kids. They can all be very interesting and provide an education in world culture and martial arts theory. However, no cultural fighting art has any proof of dominant effectiveness in the modern world. That means that Aikido, Karate,Tae-Kwon-Do, Kung Fu, and countless other cultural traditional martial arts, even including Israel's "Krav Maga", are not proven effective in combat or street application. Nor does it even classify as proven effective in combative sport such as U.F.C. and cage fighting. So, without an abundance of proof, it is only martial theory, not fact. Even with their pretty forms, they have no place in self protection. Dont get me wrong, all of these styles can POSSIBLY help you out of a tough jam because a scientific way of combat is better than NO way of combat. However, traditional martial arts instructors give there student a false sense of security. Traditional martial arts DO NOT TEACH the necessary reality-Based Scenarios or resistance training in order to prepare you for the stress of a real life situation.
MIXED MARTIAL ARTS & COMBATIVE SPORT M.M.A. & Combative Sports include Olympic judo, Brazilian Jiu-jitsu, Muay Thai kickboxing, all forms of wrestling, western boxing, and M.M.A., which has been popularized by events such as the Ultimate Fighting Championship (UFC). In combative sport, you are forced to prove the effectiveness of your methods and skill in live combat. There is no guesswork nor debate. It either works and you win, or it doesn't work and you lose. Everybody in the world saw Combat Sport Brazilian Jiu-jujitsu stylist Royce Gracie easily pick apart the cultural fighting art practitioners in the first few Ultimate Fighting Championships. If you watch Olympic Judo, you'll see the highest caliber athletes in the world competing in a sport that is symbolic of combat in that the entire basis is to establish a dominant position. Combative Sport is a very, very important component of testing the validity and effectiveness of a martial art. HOWEVER, it too is not reality-based martial arts or combat driven. It is only a training and conditioning method for self-defense. Combative sport is what you use to train yourself to make sure that your self-defense works under sport conditions. A great example is, simply, that that the rules, regulations, and referees that are required in combative sport are NOT going to be there when someone is trying mug you, rape you, trying to hurt a family member, or trying to kill you in a dark alley. Therefore, NO, even today's most popular training methods: Brazilian jiu-jitsu, Muay Thai, Wrestling, Judo, Boxing, Mixed Martial Arts, etc. are not methods of reality-based martial arts either.
REALITY-BASED MARTIAL ARTS The definition of the term "Reality-Based" is, training and survival skills based on modern conflict situations that the practitioner is likely to encounter in their environment (their "reality").
Sounds simple right? The real issue is that there are a million-and-one different ways you can be attacked. Everything from a drunk tackling you at the local bar to an armed mugging on your way home from work, a carjacking, or being caught in the middle of a military or terrorist operation. Therefore, Reality-Based Martial Arts have one purpose, and one purpose only; To survive. What we mean is that no sane person, soldiers, professional fighters, or trained martial artists truly want to hurt or kill a human being. But when it comes to bodily injury or a "kill or be killed" situation, your natural survival instinct WILL take over and do whatever it can to save your life so you can go home to your family. Learning to properly defend yourself is much more than just avoiding injury, humiliation, or even death. Our greatest enemy of all is : Fear & Incorrect Training. There IS no 100% answer to anything, but when it comes to matters of bodily injury, life and death, or protecting loved ones, the smart thing to do is stack the odds in your favor.