All people are sinners by birth.
Surely I was sinful at birth, sinful from the time my mother conceived me. Consequently, since it is our nature to sin, there is nothing we can do to stop sinning, anymore than we could stop breathing. Therefore, God had to take care of the problem. He did this, by sending his son, Jesus Christ, to die on the cross for the sins of humanity. Very rarely will anyone die for a righteous man, though for a good man someone might possibly dare to die.