What is the most likely reason that more of the characters in the giver do not act heroically?

In "The Giver," characters might not act heroically due to the strict rules and control imposed by the society, which suppress individuality and discourage independent thinking. Fear of punishment and the heavy emphasis on conformity likely contribute to characters resisting heroic actions. Additionally, the lack of knowledge about alternative ways of living and limited exposure to heroic ideals could also play a role in their behaviors.