God has been sending His Messengers/Prophets throughout history. His Messages have kept pace with evolution of mankind. The Final, Perfected and Eternally Protected Message is the Qur'an. Contrary to somewhat popular belief, not a single verse of the Qur'an has been abrogated or replaced.
2:106 Any Message that We revoke or cause to be lost to history, We replace it with a better or similar one. Do you not know that God is the Supreme Controller of all things and events? [Some of the People of the Book questioned why a new Revelation was necessary. The evolution of human civilization had now come to a point where the Final Message for all mankind could be given, widely distributed, and preserved forever. So, the Qur’an is now the complete, perfected Message for all mankind at all times and its preservation is guaranteed by none but the Almighty Himself. 5:48, 6:114-116, 15:9, 16:101, 22:52]
13:36 So, those to whom We have given the Book, rejoice in what is revealed to you (O Prophet). But, among the (dissenting) groups, there are those who deny a part of it. Say, “I am commanded only that I serve God and associate none with Him. Unto Him I invite all mankind, and He is my goal.” [The dissenting groups even preach that some of the verses are abrogated or that they have a hidden meaning]
13:37 Thus, We have revealed it, a decisive authority in Arabic. (O Prophet) if you follow their likes and dislikes after the knowledge has come to you, you will have no protector or defender against God.