the human capacity for good and evil theme

The story makes a point about individual human's capability to be both, or alternatingly, good and evil. If explicit reference is not made to this idea, a story is still deemed to exhibit the theme if there is a character who in an exaggerated way is both good and evil.

Examples

In, for example, "Dr. Jekyll and Mr. Hyde" (1931), Henry Jekyll used a drug to switch between dominant aspects of his own personality: his philanthropist good self on one hand, and his evil split personality, Edward Hyde, on the other.

39 total · 5 choice · 32 major · 2 minor

StoryLevelMotivation
tng3x22 choice Data was preeminently good whereas Fajo was almost pure sadistic evil
tos1x04 choice Good Kirk vs. Evil Kirk
tos2x10 choice mirror Kirk was pure evil, mirror Spock not so bad
tos3x05 choice Gorgon was pure evil in contrast to the innocent and pure children.
voy3x18 choice the geniuses The Doctor incorporated into his programming had good and evil inclinations
ds92x23 major we are shown there is a fine line between someone leading a life of good versus a life of pure evil
movie: A Clockwork Orange (1971) major The Minister of the Interior tried to make criminal violence a thing of the past by mentally conditioning violent criminals using a behaviorist psychological on them.
movie: Abbott and Costello Meet Dr. Jekyll and Mr. Hyde (1953) major Dr. Jekyll supposed that people have both a good and evil side, and that if we could rid ourselves of our evil sides, then we could make a better world.
movie: Cube Zero (2004) major The story explores how two otherwise ordinary guys justify that they are employed to oversee people getting dumped into a maze on interconnected cubes and left there to all die horrible deaths. Both men ultimately come to see that what they are doing is terribly wrong and take steps to help the captives.
movie: Dr Jekyll and Ms Hyde (1995) major Richard was humble and kind-hearted in contrast with his evil female alter-ego Helen.