Naṣīr al-Dīn Ṭūsī's (d. 672/1274) Nasirean Ethics is the single most important work on philosophical ethics in the history of Islam. Translated from the original Persian into Arabic in 713/1313, the present text was primarily intended for the Arabic-speaking majority of the people in Iraq. A fine example of medieval Persian-to-Arabic translation technique, this first edition carefully reproduces Middle Arabic elements that can be found throughout the text.