 actualism and possibilism in ethics |  Bentham, Jeremy |  consequentialism |  consequentialism: rule |  egoism |  hedonism |  Kant, Immanuel: moral philosophy |  Mill, John Stuart |  Moore, George Edward |  properties |  reasons for action: agent-neutral vs. agent-relative |  reflective equilibrium |  Ross, William David |  Sidgwick, Henry |  underdetermination, of scientific theories |  utilitarianism: history of |  voluntarism, theological 