Write a five sentence summary about the beginnings of Islam where it started who started it and why

Islam originated in Mecca and Medina at the start of the 7th century CE, approximately 600 years after the founding of Christianity. The origin of Islam is generally accredited to the prophet Muhammad but to the devout Muslim, Islam began long before Muhammad ever walked the earth. Muhammad believed that he had been told the word of Allah by the angel Gabriel. Muhammad dictated the Qur'an, the holy book of Islam, which Muslims believe to be the pre-existent, perfect words of Allah. These words are held to by millions of people today.