The document discusses several theories of ethics including utilitarianism, rights, justice, and egoism. Utilitarianism examines the costs and benefits of actions to determine the greatest good. It can ignore individual rights and is focused on efficiency. Rights theory focuses on allowing individuals to freely pursue actions without interference from others. Justice looks at the fair distribution of costs and benefits among groups. Egoism judges actions based on their effects on an individual's interests. The document also provides an analytical approach to ethical problems by considering utility, rights, and justice.