Ethical disagreement is a fact of social life. We disagree about issues such as abortion, euthanasia, the meaning of justice and the treatment of animals, and our debates often fail to reach a consensus. Some philosophers think that this means there is no objective knowledge about morality. Discourse and Knowledgetakes a radically different approach to the defence of ethical rationality. It claims that there is a correct solution to ethical controversies, but that ethical decisions have to be made collectively. Written specifically for those studying or teaching ethics or moral theory,Discourse and Knowledgewill also be ideal for those on courses on social theory, ethics or feminist philosophy.Janna Thompson is Senior Lecturer in Philosophy at La Trobe University, She is the author ofJustice and World Order :A Philosophical Inquiry,also published by Routledge.