The Trolley Problem is a thought experiment in ethics and moral psychology. It presents a scenario where a runaway trolley is heading towards five people tied to a track. You can pull a lever to divert the trolley onto another track, where it will kill one person instead. This dilemma raises questions about utilitarianism, the morality of sacrificing one life to save many, and the value of individual lives. This problem has been widely discussed in philosophy, psychology, and even artificial intelligence. It challenges individuals to consider their moral principles and the implications of their choices, often leading to debates about the nature of right and wrong in difficult situations.