The Almohad princes had a longer and more distinguished career than the Murabits. The successors of Abd al-Mumin, Abu Yaqub Yusuf (Yusuf I, ruled 1163–1184) and Abu Yusuf Yaqub al-Mansur (Yaʻqūb I, ruled 1184–1199), were both able men. Initially their government drove many Jewish and Christian subjects to take refuge in the growing Christian states of Portugal, Castile, and Aragon. Ultimately they became less fanatical than the Murabits, and Ya'qub al-Mansur was a highly accomplished man who wrote a good Arabic style and protected the philosopher Averroes. His title of "al-Manṣūr" ("the Victorious") was earned by his victory over Alfonso VIII of Castile in the Battle of Alarcos (1195).