As the first child of a whitelighter and one of the Charmed Ones he has almost unlimited powers. Feared by the evil side and even by the Elders he was in constant danger from birth on.
The Elder Gideon tried to kill him and by doing so he almost turned the little boy to the evil side.
His younger brother Chris came back from a future ruled by an adult and then evil Wyatt to prevent his brother from turning evil.