The Turco-Persian society was a dual society, ruled by two separate ethnic classes. The Turco-Mongols were the Tatar warrior caste of the society. They claimed descent from the Mongol ruler Chinghiz Khan, although they spoke either Turkic languages or Persian rather than Mongolian tongues. They lived their lives largely on horseback as fierce conquerors. The other part of the ruling class was of Persian origin. Most of the ruling kings were of mixed heritage, both Persian and Turkic, like the Timurid kings Shah Rukh and Ulugh Beg.
While the Turks were the warrior caste, the Persians were responsible for administration. Besides that, most of the clerks and religious teachers were Persians. They were called Tajiks by the Turks. Until today, Tajiks are the only Non-Turkic people in Central Asia.