Of course, ancient PANKRATION was/is(?) the "absolute ultimate" empty-handed fighting art...
Pankration, as practiced in the ancient world, combined elements of both boxing (pygme/pygmachia) and wrestling (pale) to create a broad fighting sport similar to today's mixed martial arts. A match was won by submission of the opponent or if the opponent was incapacitated. A contestant could signal submission by raising his hand, but sometimes the only form of submission was unconsciousness or death. Joint locks and choke holds were common techniques of accomplishing this. In fact, there were only two rules: contestants were not allowed to gouge eyes or to bite. Grave, even permanent injuries were common as an accepted means of disabling the adversary: mainly breaking limbs, fingers or even the neck. Pankration bouts were quite brutal and sometimes life-threatening to the competitors. There were no weight divisions and no time limits. The fighting arena or "ring" was no more than twelve by fourteen feet to encourage close-quarter action. Referees were armed with stout rods or switches to enforce the rules against biting and gouging. The rules, however, were often broken by some participants who, realizing they were outclassed by a heavier and stronger foe, would resort to such measures to escape being seriously maimed. The contest itself continued uninterrupted until one of the combatants either surrendered, suffered unconsciousness, or was killed. Although knockouts were common, most pankration battles were decided on the ground where both striking and submission techniques would freely come into play. Pankratiasts were highly-skilled grapplers and were extremely effective in applying a variety of takedowns, chokes, and punishing joint locks. Strangulation was most feared during ground combat, and was the leading cause of death in matches. A fighter would immediately raise his arm in defeat once his opponent's forearm had secured a firm grip across the windpipe or carotid artery (though there are stories of fighters who chose to die rather than surrender.)
If there was no winner by sunset, the judges would declare Klimax and the fighters would start taking alternating undefended blows until one was defeate
The feats of the ancient pankratiasts became legendary in the annals of Greek athletics. Stories abound of past champions and masters who were considered invincible beings. Arrichion, Dioxippus and Polydamas are among the most highly-recognized names, their accomplishments defying the odds by besting multiple armed opponents in life-and-death combat.
Among pankration fighters, Dioxippus was the most famous. He won several Olympic games as no one dared challenge him, became friends with Alexander the Great and some accounts claim he defeated one of Alexander the Great's soldiers named Coragus (who fought with weapons and full armour), armed only with a club. Later, Dioxippus was framed of theft, which led him to commit suicide.
In the lead-up to the 2004 Athens Olympic Games, a modern version of pankration (not naked, usually wearing only shorts or a type of loin cloth, sometimes also T-shirts) was tipped as being a new sport in the Olympiad, especially due to its being an event in the ancient games. However, its application (along with that of inline skating) was not approved. Rumours were that it was rejected due to its inherently violent nature, even though the modern version is significantly less violent than the original, and like boxing and wrestling, also ancient Olympic sports, there is an international set of humane rules governing the modern sport.
Influence:
Because of Alexander the Great's impact on the Middle East and India, there is a belief by some that cultural exchange may have occurred in these civilizations. It has been suggested that the fighting systems of India were influenced by the invasions of Alexander, but this has not been substantiated by firm scientific evidence. It is still unknown what cultural influence he may have had on India. A thorough anthropological study of this history would be required.
Pankration's influence on modern culture is still debatable as the modern version of Pankration is not the original form as practiced by the ancient Greeks. The original ancient Greek form of Pankration was not fully transmitted to later generations due to the fall of the Greek and Roman civilizations and the subsequent European Dark Ages. Most modern versions of Pankration are influenced by Western boxing, catch and freestyle wrestling, ancient Greek artifacts (i.e. pottery, vases, sculptures, writings), as well as East Asian martial arts like karate, kung-fu, jujitsu, and muay thai.
Advocates for the sport have formed a US Pankration Team, and it is possible that a modern version of the sport could be introduced at the Olympics in the future.
Some modern pankration groups are seeking to re-introduce classical Hellenistic culture into contemporary martial arts (sport, athleticism, philosophy, ethics, and all round personal development). One such system of "contemporary" Pankration, known as "Mu Tau Pankration," was founded by Demetrios "Jim" Arvanitis in the latter half of the 20th Century. The first modern palaistra (school) was established in 1971.
Mr. Arvanitis has published three non-fictional books on modern pankration: MU TAU: The Modern Greek Karate, Todd & Honeywell, NY, 1979; MU TAU PANKRATION: Volume 1/Concepts and Skills of "All-Powers" Combat, Spartan Publications, Boston, MA, 1997; PANKRATION: The Traditional Greek Combat Sport and Modern Mixed Martial Art, Paladin Press, Boulder, CO, 2003.