Moral dilemmas can be big or small, from whether to keep pets or recycle assiduously to how to use your vote, or whether it's right to assist someone who wants to die. We all have our own ideas about what is right and what is wrong, but is this something we can know rather than merely believe? Introducing Ethics traces the arguments of the great moral philosophers including Socrates, Plato, Aristotle, Hobbes and Kant, and explores what more modern thinkers such as Jean-Paul Sartre, John Rawls and Richard Rorty have brought to the debates.