Arnold Joseph Toynbee (d. 1975), influenced by Ibn Khaldun, is highly regarded among contemporary Muslim scholars. His work, "A Study of History," examines the rise and fall of civilizations, focusing on the factors leading to the decline of Islamic civilization, notably the lack of unity within the Muslim Ummah. This research aims to provide a brief overview of Toynbee’s life and his philosophical influences, specifically Ibn Khaldun. The methodology involves an analysis of Toynbee’s writings and their reception …