Ethics is, in general terms, the study of right and wrong. It can look descriptively at moral behaviour and judgements; it can give practical advice (normative ethics), or it can analyse and theorise about the nature of morality and ethics. Contemporary study of ethics has many links with other disciplines in philosophy itself and other sciences. Normative ethics has declined, while meta-ethics is increasingly followed. Abstract theorizing has in many areas been replaced by experience-based research.