Who wrote the unexamined life is not worth living?

The phrase "the unexamined life is not worth living" is attributed to the ancient Greek philosopher Socrates. It is one of his most famous quotes and reflects his belief in the importance of self-knowledge and critical thinking. Socrates believed that a life without reflection and self-examination is not truly a life at all, as it lacks the depth and meaning that come from understanding oneself and one's place in the world.