approximated Herodotean inclusiveness; Polybius (c.200-c.118 BC) aspired to combine the logical rigor of Thucydides with the scope of Herodotus. Rashīd al-Dīn Fadhl-allāh Hamadānī (1247–1318), was a Persian physician of Jewish origin, polymathic writer, and historian, who wrote an enormous Islamic history, the Jami al-Tawarikh, in the Persian language, often considered a landmark in intercultural historiography and a key document on the Ilkhanids (13th and 14th century). His encyclopedic knowledge of a wide range of cultures from Mongolia to China to the Steppes of Central Eurasia to Persia, the Arabic-speaking lands, and Europe, provide the most direct access to information on the late Mongol era. His descriptions also highlight how the Mongol Empire and its emphasis on trade resulted in an atmosphere of cultural and religious exchange and intellectual ferment, resulting in the transmission of a host of ideas from East to West and vice versa. One Muslim scholar, Ibn Khaldun (1332–1409) broke with traditionalism and offered a model of historical change in Muqaddimah, an exposition of the methodology of scientific history. Ibn Khaldun focused on the reasons for the rise and fall of civilization, arguing that the causes of change are to be sought in the economic and social structure of society. His work was largely ignored in the Muslim world. Early modern During the Renaissance in Europe, history was written about states or nations. The study of history changed during the Enlightenment and Romanticism. Voltaire described the history of certain ages that he considered important, rather than describing events in chronological order. History became an independent discipline. It was not called Philosophia Historiae anymore, but merely history (Historia). Voltaire, in the 18th century, attempted to revolutionize the study of world history. First, Voltaire concluded that the traditional study of history was flawed. The Christian Church, one of the most powerful entities in his time, had presented a framework for studying history. Voltaire, when writing History of Charles XII (1731) and The Age of Louis XIV (1751), instead choose to focus on economics, politics, and culture. These aspects of history were mostly unexplored by his contemporaries and would each develop into their sections of world history. Above all else, Voltaire regarded truth as the most essential part of recording world history. Nationalism and religion only subtracted from objective truth, so Voltaire freed himself for their influence when he recorded history. Giambattista Vico (1668–1744) in Italy wrote Scienza Nuova seconda (The