Introduction of Non-Buddhist Medical Traditions in Tibet
The earliest medical system in Tibet was the pre-Buddhist one of Bon, going back to at least a thousand years before the common era. Its medical literature is preserved in the four Bonpo medical texts, called The Four Hundred Thousands (’Bum-bzhi) and studied as part of the training for the Geshe degree at Bonpo monasteries. Some of its terminology and approaches have survived into the modern Buddhist system.
The next period began in the mid-fifth century AD, when two physicians came from South India during the reign of the twenty-eighth Yarlung king of Central Tibet, Lhathothori Nyentsen (Lha-tho-tho-ri gNyan-btsan). One of them married the king’s daughter and their descendants became the court physicians. It was during the reign of this king that the first Buddhist texts came to Tibet from India.
Since the title of this first doctor was “biji,” which is the Sogdian word for doctor, it is possible to conjecture that this physician had some connection with the region of Sogdia, located in what is nowadays Uzbekistan. During this period, Sogdian merchants and cultural influences were commonly found throughout Central Asia, particularly along the Silk Route from India to China. But since Sogdian was the international language of commerce for the entire area, it is also possible that the Sogdian word for doctor was used generically throughout the region, much as the Mongolian word for doctor, “emchi,” has been used in more modern times to denote a doctor. It is difficult to know exactly what tradition of medicine this line of “biji” practiced.
The main events that shaped the development of the Tibetan Buddhist system occurred during the rule of Emperor Songtsen Gampo (Srong-btsan sgam-po) in the early to mid-seventh century. This was the great Yarlung king who founded the Tibetan Empire, stretching from northwestern China nearly to Afghanistan, to Nepal and to northern Burma, and who had sent his minister, Thonmi Sambhota (Thon-mi Sambhota), to Khotan to develop a writing system for Tibet, though the minister adapted it in Kashmir on his way there. This emperor had both a Chinese and a Nepalese princess as his wives. The former one brought with her from China several texts on Chinese medicine and astrology, which were translated into Tibetan.
Emperor Songtsen Gampo invited to his court physicians from the three major medical traditions of the time. These were the Hindu Ayurvedic system of India, the classical Chinese tradition and the ancient Greek system. This latter came from Tazik and Rome. “Tazik” refers to the Persian world, including modern-day post-Soviet Central Asia and Afghanistan, Sogdia as well. It is also the name of the land where the founder of the Bon tradition, Tonpa Shenrab Miwo (sTon-pa gShen-rab Mi-bo), came from, according to traditional Bonpo sources. “Rome” refers to the Eastern Roman or Byzantine world, including the Arab regions. The ancient Greek medical system had survived in these areas from the time of the conquests of Alexander the Great. There were also physicians of the shamanic system of medicine of Mongolia, which was ruled at that time by the Northern Turk Khaganate.
The representatives of each of the three major systems translated some of their own texts and compiled together in Tibetan a seven-volume work on medicine. The Greeks specialized in operations and dissection, and at first it was their system that was favored. The Greek physicians were kept at court, while the Chinese and Indians were sent home. A code similar to the ancient Greek Hippocratic oath was adapted that emphasized treating the poor, having doctors come from simple families and following an altruistic code of ethics.
During the second half of the eighth century, Emperor Tri Songdetsen (Khri Srong-lde-btsan, Trisong Detsen) invited once more to Tibet physicians from these same three traditions, as well as from Nepal. They came from as far away as Persia, the Arab Caliphate and Byzantium, as Tibet in those days had contact with all of them. Tri Songdetsen was the famous emperor who had briefly conquered the Chinese capital and under whom the Tibetan Empire included the Tarim Basin of East Turkistan as well as many of the mountainous areas of West Turkistan. He is remembered for having invited Shantarakshita and then Guru Rinpoche Padmasambhava from India to Tibet to establish Indian Buddhism. These doctors compiled together some more medical texts and trained a number of Tibetan physicians.