Anthropology is the study of humans and human behaviour and societies in the past and present. Social anthropology and cultural anthropology study the norms and values of societies. Linguistic anthropology studies how language affects social life. Biological or physical anthropology studies the biological development of humans.
Ethnology (from the Greek ἔθνος, ethnos meaning "nation") is the branch of anthropology that compares and analyzes the characteristics of different peoples and the relationship between them (cf. cultural, social, or sociocultural anthropology).
For Immanuel Kant, the term anthropology embraced all the human sciences, and laid the foundation of familiar knowledge we need, to build solidly grounded ideas about the moral and political demands of human life. Margaret Mead saw mid-twentieth-century anthropology as engaged in a project no less ambitious than Kant's own, and her Terry Lectures on Continuities in Cultural Evolution provide an excellent point to enter into her reflections.
Margaret Mead (1964) Continuities in Cultural Evolution. p. xii