Ibn Khaldūn or Ibn Khaldoun (full name, Arabic: ابو زيد عبد الرحمن بن محمد بن خلدون الحضرمي, Abū Zayd ‘Abdu r-Raḥman bin Muḥammad bin Khaldūn al-Ḥaḍramī) (May 27, 1332 AD/732 AH – March 19, 1406 AD/808 AH), was a famous Arab Muslim polymath, historian, historiographer, demographer, economist, philosopher, sociologist and social scientist born in present-day Tunisia. He is regarded as a father of demography, historiography, the philosophy of history, sociology, and the social sciences, and is viewed as one of the forerunners of modern economics. He is best known for his Muqaddimah (Latinized as Prolegomenon).