Date and textual history manuscript. According to some scholars, the Yassa was proclaimed by Genghis Khan at
the kurultai of 1206, when he officially assumed the title of Genghis Khan. In the
Secret History, Genghis Khan tells his adopted son Shigi Qutuqu to create a register of jurisprudence, which implies the existence of such a document:"Furthermore, writing in a blue-script register all decisions about the distribution and about the judicial matters of the entire population, make it into a book. Until the offspring of my offspring, let no one alter any of the blue writing that Šigi Qutuqu, after deciding in accordance with me, shall make into a book with white paper. Anyone who alters it shall be guilty and liable to punishment." The Yassa may have later been written down in the
Uyghur script, preserved in secret archives and known only to and read only by the royal family.
Juvyani, in the
Tarikh-i Jahangushay, writes of the role of the
yasas during a
kurultai (a military council):These rolls are called the
Great book of the Yasas and are kept in the treasury of the chief princes. Whenever a khan ascends the throne, or a great army is mobilized, or the princes assemble and begin [to consult together] concerning affairs of state and the administration thereof, they produce these rolls and model their actions thereon;The Yasa decrees were thought to be comprehensive and specific, but no Mongolian scroll or codex has been found. There are records of excerpts among many chronicles including those of
al-Maqrizi,
Vardan Areveltsi, and
Ibn Battuta. The first of these may have relied on the work of Ata-Malik Juvayni, an
Ilkhanate official. Moreover, copies may have been discovered in Korea as well. In the end, the absence of any physical document is historically problematic. Historians are left with secondary sources, conjecture and speculation, which describe much of the content of the overview. Historical certainty about the Yassa is weak compared to the much older
Code of Hammurabi (18th century BCE) or the
Edicts of Ashoka (3rd century BCE). The latter was carved for all to see on stone plinths, 12 to 15 m high, which were located throughout Ashoka's empire (now India, Nepal, Pakistan and Afghanistan).
Among the successors of Genghis Khan , early 14th century
Ögedei Khan, the third son of Genghis Khan and the second Great Khan, proclaimed the Great Yassa as an integral body of precedents at his coronation at
the kurultai of 1229. He confirmed the continuing validity of his father's commands and ordinances, and added his own. Ögedei codified rules of dress, as well as the conduct of the kurultais. His two immediate successors followed the tradition of proclaiming the Yassa at their coronation. The Mongols who lived in various parts of the empire began to add laws that were needed in their areas.
Present-day influence In the modern
Turkish language (as used presently in
Turkey), the word for "law" is
yasa, and the adjective "legal" is
yasal. The word for a
constitution, including the
Constitution of Turkey, is
Anayasa ("mother-law"). ==Overview of contents==