Ibn Al-Athir was a prominent Arab historian and biographer born in 1160 in Mosul, Iraq. He is best known for his comprehensive historical work, "Al-Kamil fi al-Tarikh," which chronicles the history of the world from the creation to his own time, focusing on the Islamic world and the Crusades. His writings are valued for their detailed accounts and critical analysis of events, making him a significant figure in Islamic history. Ibn Al-Athir's contributions have influenced both historians and scholars, providing insights into the political and social dynamics of his era.