Anthropology is a holistic science that deals with the study of human cultures, language, behaviour or biology in the present, as well as in the past. According to the American model, anthropology can be divided into 4 subdisciplines – social or cultural, linguistic, physical and archaeological anthropology. In the European context, these subdisciplines are taught and formed as separate disciplines. Social anthropology studies various phenomena occurring within the realm of human cultures and societies. It uses ethnography and long-term field research within particular communities in order to explain social or cultural differences and similarities. Areas addressed by anthropologists and anthropologists may include, but are not limited to, culture, economics, religion, politics, social structure and organization, kinship, or aspects of gender.