What theme is a lesson that a literary text conveys about humanity.?

One common theme in literary texts about humanity is the idea that people are capable of both great good and great evil. These texts often explore the complexities of human nature, illustrating how individuals can exhibit kindness, compassion, and love, as well as greed, hatred, and cruelty. Through characters and their actions, these stories highlight the moral ambiguity and duality of human behavior.