In his 1914 book, "Abenmasarra y su escuela. Orígenes de la filosofía hispano-musulmana", Asín opens by describing the evolution of Islamic philosophy and cosmology at the center of Islamic civilization in the East, in comparison with its later emergence in Al-Andalus (Muslim Iberia). A brief biography of Ibn Masarra (883-931) follows. There Asín posits the continuation of pre-existing Iberian culture among Hispanic natives who, following its conquest, converted to Islam. Because of AbeMnmasarra's father's client status (to his Berber mawla), Asín infers that he was such a Muslim 'Spaniard' ("muwallad"). Asín describes his affinity to Greek philosophy, i.e., neoplatonism, then notes the accusations of heresy against him, and that he early concealed his teachings. At the time the Umayyad Emir Abdullah ibn Muhammad al-Umawi challenged by political unrest, and armed rebels such as 'Umar ibn Hafsun, showed little tolerance for religious dissenters such as Abenmasarra. Ibn Masarra felt compelled to flee, traveling to Qairawan and Mecca. He eventually returned to Córdoba under the tolerant rule of the Umayyad caliph Abd ar-Rahman III (r.889/91-961), where he founded a School with elements of Sufism.