What are the contributions of ibn khaldun?

Ibn Khaldun was a prominent medieval Arab historian and philosopher known for his work "Muqaddimah," which laid the foundation for several Social Sciences, including sociology, historiography, and economics. He introduced concepts such as social cohesion, group solidarity, and the role of geography in shaping civilizations. Ibn Khaldun also emphasized the cyclical nature of dynasties and the impact of economic factors on the rise and fall of civilizations.