What is the origin of Muslim belief?

Answer 1

For many Muslims the term "Islam" has two meanings: the Divine Religion of Submission to God's Will (often called Islam with a small "i") and the Institutionalized Belief as Found in Qur'an and Revealed by Mohammed's Prophecy (often called Islam with a capital "I").

islam with a small "i" (henceforth written as "islam") is a concept that comes out of Islam with a capital "I" (henceforth written as Islam") and projects the Established Religion of Islam back into the period before would have identified as Muslim. The purpose of said belief, in a functional sense, is to gird Islam in the history afforded by the Judeo-Christian prophetic lineage and ensure its authenticity. islam also affords the believer in Islam a continuity of tradition which Mohammed only continued and corrected as opposed to having the religion of Islam be an affront or disagreement with other divinely-inspired religions.

Islam, as an Established Religion, was organized and directed by Mohammed, who, according to Islam, received revelations from God in Mecca in the late 6th century. He was supported by several family members like his uncle Ali Ibn Talib and his first wife Khadija to pursue these prophecies. He converted other members to his nascent religion before being expelled from Mecca to Yethrib (now known as Medina) in 622 C.E. When Mohammed became the Chief Hakam or Judge/Administrator of Yethrib, he received many new revelations and began to ask members of his community to memorize these revelations (along with prior ones). These memorizers (in Arabic Hafeths) would eventually be responsible for the creation of one unified Qur'an. By Mohammed's death, he had conquered all of Arabia and converted most of Arabia to his new faith, establishing the grounds for an Islamic Caliphate, which succeeded him.