In "The Plague," Albert Camus emphasizes that ignorance is the root of much evil in the world. He argues that while people may generally have good intentions, their lack of awareness can lead to harm, suggesting that goodwill can be just as dangerous as ill-will if not informed by understanding. Camus highlights the importance of knowledge and enlightenment in distinguishing between virtue and vice, warning against the arrogance of ignorance that believes it knows everything.

Camus also explains that the most significant vice is a blind ignorance that permits harmful actions, such as murder. He believes that true goodness and love can only flourish when accompanied by a high degree of insight and clarity. His reflection illustrates that a lack of understanding can distort human behavior and lead to tragic consequences. Ultimately, the author advocates for the pursuit of knowledge as essential to harnessing human potential for good.