When the Arab world was tolerant and accepting of others, it led the world: From Baghdad to Damascus to Andalusia and farther afield, we provided beacons of science, knowledge, and civilization, because humane values were the basis of our relationships with all civilizations, cultures, and religions. Even when our ancestors left Andalusia, people of other faiths went with them, writes Mohammed bin Rashid Al Maktoum, Vice President and Prime Minister of the United Arab Emirates and Ruler of Dubai.