For Sidgwick, ethics is about which actions are objectively right. Our knowledge of right and wrong arises from common-sense morality, which lacks a coherent principle at its core. The task of philosophy in general and ethics in particular is not so much to create new knowledge but to systematize existing knowledge. Sidgwick tries to achieve this by formulating "methods of ethics", which he defines as rational procedures "for determining right conduct in any particular case". He identifies three methods: "intuitionism", which involves various independently valid moral principles to determine what ought to be done, and two forms of "hedonism", in which rightness only depends on the pleasure and pain following from the action. Hedonism is subdivided into "egoistic hedonism", which only takes the agent's own well-being into account, and "universal hedonism" or "utilitarianism", which is concerned with everyone's well-being.