During the month of Ramadan in 610 C.E., an Arab businessman had an experience that changed the history of the world. Every year at this time, Muhammad ibn Abdallah used to retire to a cave on the summit of Mount Hira, just outside Mecca in the Arabian Hijaz, where he prayed, fasted and gave alms to the poor. He had long been worried by what he perceived to be a crisis in Arab society. In recent decades, his tribe, the Quraysh, had become rich by trading in the surrounding countries. Mecca had become a thriving mercantile city, but in the aggressive stampede for wealth some of the old tribal values had been lost. Instead of looking after the weaker members of the tribe, as the nomadic code prescribed, the Quraysh were now intent on making money at the expense of some of the tribe's poorer family groupings, or clans. There was also spiritual restlessness in Mecca and throughout the peninsula. Arabs knew that Judaism and Christianity, which were practices in the Byzantine and Persian empires, were more sophisticated than their own pagan traditions. Some had come to believe that the High God of their pantheon, al-Lah (whose name simply meant "the God"), was the deity worshipped by the Jews and the Christians, but he had sent the Arabs no prophet and no scripture in their language. Indeed, the Jews and Christians whom they met often taunted the Arabs for being left out of the divine plan. Throughout Arabia one tribe fought another, in a murderous cycle of vendetta and counter-vendetta. It seemed to many of the more thoughtful people in Arabia that the Arabs were a lost people, exiled forever from the civilized world and ignored by God himself. But that changed on the night of 17 Ramadan, when Muhammad woke to find himself overpowered by a devastating presence, which squeezed him tightly until he heard the first words of a new Arab scripture pouring from his lips.