Normative ethics is divided between ethical theory and practical ethics. Three families of ethical theories are consequentialism, virtue ethics, and Kantianism. Consequentialism is the view that consequences determine what we ought to do. Virtue ethics is the view that right actions should be understood in terms of virtuous agents and their character. Kantianism’s central concern is with how rational agents ought to relate to themselves and to each other. Ethical theory is difficult to disentangle from practical ethics, which is concerned with what we ought to do in particular situations, which – along with the question “How should I live?” – is the most important topic in ethics and perhaps all of philosophy.