Islam means submission to Allah (God). It is the same root with Salam (SLM) which means peace.
Islam is not invented by Muhammad PBUH. In fact, Muhammad is just one of the prophets of Allah. The last prophet of all.
Prophets such as Adam, Noah, Abraham, Moses, Jesus, etc all taught Islam religion. Maybe we do not aware of this, but many of them say that they bring “PEACE” (Islam) to the world.
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