Ibn Khaldun was an influential 14th century Muslim scholar, historian and sociologist. He is considered a forerunner of modern sociology, historiography and economics for his theories on social conflict, the rise and fall of civilizations, and other social sciences. In his magnum opus, Muqaddimah, he developed theories around the concepts of asabiyyah (social cohesion) and umran (civilization) to explain the rise and fall of dynasties and empires. The Muqaddimah covered topics like sedentary and nomadic cultures, social organization, politics, economics and other intellectual sciences in a philosophical and sociological manner that was ahead of his time.