Ethics is the philosophical study of morality and seeks to understand concepts like good, evil, right, wrong and justice. There are differing views on the source and nature of morality. Objectivists believe morality is objective and stems from supernatural beings or natural laws, while subjectivists see it as subjective and based on human rationality. Major ethical theories discussed include utilitarianism, deontology, virtue ethics and ethical relativism. Different theories provide various approaches to determining what constitutes moral and ethical behavior.