@El'endiaStarman The word "islam" can be translated as "surrender/submission" (to God). A "muslim" can be translated as "one who surrenders/submits" (to God).
According to The Quran, everything in the universe, willingly or unwillingly has ultimately surrendered to God, thus the basic concept of islam/surrender/submission is as old as the universe itself:
Do they seek other than the system of God, when all things in the heavens and the earth, willingly or unwillingly have surrendered to Him, and to Him they will be returned. [3:83]