Well, this is not EXACTLY the kind of discussion I was expecting, but I will respond to a few statements. First, TJS is absolutely right about people who underestimate the value of the guard. The biggest innovation to come to mainstream combat arts in the last 20 years is most certainly the guard. It is simply a matter of physics. By elevating my lower back, and wrapping my legs around the waist, or lower abdomen, of my attacker, I negate his center of gravity and the impetus for his downward leverage. I can effectively use my legs, the strongest parts of the human body, to control my attackers positioning and balance. This is far preferable to allowing an attacker a full mounted position upon your chest, a knee upon your stomach, or even a perpendicular half mount (aka side mount). Quite frankly, if you are not in some sort of top position, the absolute best situation is the guard. However, I also disagree with TJS in the fact that when he completely refutes tactics such as "dirty" fighting (eye gouges, fish hooking, etc), small joints, biting, pressure points, and such. Perhaps one of the most dangerous martial arts ever encountered is also one of the forefathers: Yoshin-Ryu Ju Jitsu. YRJJ is the original form of Japanese Ju Jitsu, and it is the basis for all other Japanese martial arts, from Karate to Kendo to Judo. Yoshin-Ryu, along with many other forms of Japanese Ju Jitsu, teaches: Submission fighting, grappling, clinching, throws and takedowns, striking (knees, elbows, kicks and punches), weapons use, pressure point manipulation, anatomical understanding, and, more controversially, "dim mak", or death touches. All of this is learned, and it takes many, many years for someone to achieve the purple belt (equiv. to black in other arts), often 12-15 years. My father is a fourth degree Purple in Yoshin-Ryu, and I have dabbled myself in many arts and trained with him. I am now studying Muay Thai and Brazilian Ju Jitsu under a Romero Cavalcanti certified Brown Belt...and it doesn't do jack against my 64 year old father. I am 22. And it is interesting to note how he fights, when we fool around and such. Attempting armbars on someone who knows Pressure points and can toy with your sciatic nerve (and does!) gives you, as a grappler, a new appreciation for the depth of ground combat. and I have learned countless alternate ways to apply ankle locks, heel hooks, and triangles that leave me in awe of their effectiveness. All from the supposedly "obsolete" style of JJJ. As to whether Vale Tudo is the most effective form of martial arts (the original question for this thread), I think the street oriented drive of Vale Tudo, which is INCREDBILY effective in real life situations, is not necessarily the MOST effective. Vale Tudo has a ridiculous advantage over single style arts when put in NHB situations, and most Karateka, Judoka, Tae Kwon Do, Silat, Kickboxers, and especially Boxers, are totally outclassed when fighting a seasoned Vale Tudo fighter. However, other arts, such as combat versions of aikido, and many styles of Japanese Ju Jitsu, bestow far more options, most of them lethal, to aid in one's self defense. So it really is a toss up.