why was tom riddle evil
Voldemort (Harry Potter character) Because he was conceived through a Love Potion, and he didn't have a loving mother to nurture him. His mother, Merope Gaunt, only became pregnant with him because she had seduced Tom Riddle Sr. with Love Potions. She stopped giving him Love Potions, possibly because she thought or hoped he would stay for the baby's sake (according to Dumbledore).