What is the fine-grained topic of the following text: Islamic thinkers listed on the site include: Ibn Ishaq Al-Kindi (Alkindus, 800-873); Al-Farabi (Al-Pharabius, 870-950); Ibn Sina (Avicenna, 980-1037); Al-Ghazali (Algazel, 1058-1111); Abu Bakr Muhammad Ibn Yahya (Ibn Bajjah, 1106-1138); Ibn Rushd (Averroes, 1128-1198); Ibn Khaldun (1332-1395). Only return the topic.
Islamic Thinkers