What is Islam?
Islam did not start with Prophet Muhammad in the 7th century. Technically, Islam is the message that was delivered by all the prophets of God from Adam to Muhammad. Islam is neither named after a person or a tribe nor does it end with an —ism. Though each prophet had a relatively different law, the essence of the message of Islam was always the same: have faith in one God and do good. In the Bible, the first four of the Ten Commandments enjoin the worship of one God; the rest urge believers to avoid what is wrong and to do what is good. All prophets and their followers (including Jesus and his disciples) are simply called “Muslims” in the Quran. Hence, anyone who submits to God and strives to be a good person can be called a ‘muslim’ (with a small ‘m’) from a linguistic perspective.
Every human being is born with the innate will (fitrah) to submit to God, but parents and society change this nature, and in order to relate to the Almighty, many have put a face on God (mostly human or animal) throughout history. The process of restoring the fitrah is called reversion.
Khattab, Mustafa. The clear Quran: a thematic English translation of the message of the Final Revelation. Lombard, IL, Book of Signs Foundation, 2016