Islam is a major world religion. Islam is based on the teachings of the prophet Muhammed (570–632 CE), who claimed a direct revelation from God (Arabic: “Allah”) contained in a sacred text called the Quran, which details a code of conduct for believers. By the end of the twelfth century Islam was prevalent in most of Central Asia and Northern India, leading to the decline and disappearance of Buddhism in these regions. Today, parts of the western Himalayas (Kashmir and northern Pakistan) are majority Muslim. Muslims live as minorities in many other parts of the Himalayan world, including historically important trading communities on the Tibetan Plateau.