became the second Almohad caliph. Hayy ibn Yaqzan Ibn Tufail was the author of (), also known as Philosophus Autodidactus in Latin, a philosophical romance and allegorical novel inspired by Avicennism and Sufism, and which tells the story of an autodidactic feral child, raised by a gazelle and living alone on a desert island, who, without contact with other human beings, discovers ultimate truth through a systematic process of reasoned inquiry. Hayy ultimately comes into contact with civilization and religion when he meets a castaway named Absal (Asāl in some translations). He determines that certain trappings of religion, namely imagery and dependence on material goods, are necessary for the multitude in order that they might have decent lives. However, imagery and material goods are distractions from the truth and ought to be abandoned by those whose reason recognizes that they are. The names of the characters in the novel, Ḥayy ibn Yaqẓān, Salamān, and Absāl were borrowed from Ibn Sina's tales. The title of the novel is also the same as Ibn Sina's novel. Ibn Tufail did this on purpose to use the characters and the title as a small reference to Ibn Sina, as he wanted to touch upon his philosophy. Ibn Tufail's Philosophus Autodidactus was written as a response to al-Ghazali's The Incoherence of the Philosophers. In the 13th century, Ibn al-Nafis later wrote the Al-Risalah al-Kamiliyyah fil Siera al-Nabawiyyah (known as Theologus Autodidactus in the West) as a response to Ibn Tufail's Philosophus Autodidactus. Hayy ibn Yaqdhan had a significant influence on both Arabic literature and European literature, and it went on to become an influential best-seller throughout Western Europe in the 17th and 18th centuries. The work also had a "profound influence" on both classical Islamic philosophy and modern Western philosophy. It became "one of the most important books that heralded the Scientific Revolution" and European Enlightenment, and the thoughts expressed in the novel can be found "in different variations and to different degrees in the books of Thomas Hobbes, John Locke, Isaac Newton, and Immanuel Kant." A Latin translation of the work, entitled Philosophus Autodidactus, first appeared in 1671, prepared by Edward Pococke the Younger. The first English translation (by Simon Ockley) was published in 1708. These translations later may have inspired Daniel Defoe to write Robinson Crusoe, which also featured a desert island narrative. The novel also inspired the concept of "tabula rasa" developed