Ethics, also known as moral philosophy, is a branch of philosophy that addresses questions about morality — that is, concepts such as good and evil, right and wrong, virtue and vice, justice and crime, etc.

Major branches of ethics include:

• Meta-ethics, about the theoretical meaning and reference of moral propositions and how their truth values (if any) may be determined;
• Normative ethics, about the practical means of determining a moral course of action;
• Applied ethics, about how moral outcomes can be achieved in specific situations;
• Moral psychology, about how moral capacity or moral agency develops and what its nature is;
• Descriptive ethics, about what moral values people actually abide by. Source: Wikipedia