Summary

The first of the Prophets was Adam (Peace be upon him), the father of humanity. After his death, Adam left his descendants united and monotheist worshipping Allah the Almighty alone without any associate. The battle between good and evil begins with the incitation of Satan to Adam and Eve to disobey Allah by eating from the forbidden tree. This battle is continuous, but those who follow Allah's guidance should fear nothing while those who disobey Allah and follow Satan will be damned along with him.
The enmity between Satan and Adam was extended to Satan and Adam's sons. After Adam's death, the sons were worshiping Allah alone. Satan did not like this situation and he worked hard to mislead Adam's sons. He came up with a long-term and four-step plan to deviate them from worshiping Allah alone to associating others with Him. The steps include (1) make them drawing good people's pictures, (2) drive them from making pictures to making statues, (3) then from statues to idols, and (4) Allah's anger.
The four steps implemented, Satan succeeded in misleading Adam's sons to worship other things than Allah. They, then, encountered the anger of Allah who should be worship alone without any associate. Therefore, people needed again a good counsel, another Prophet to turn them back to Allah.