Ethology also the discontinuance of undesirable behaviours. The term "ethology" derives from the Greek language: ἦθος, "ethos" meaning "character" and , "-logia" meaning "the study of". The term was first popularized by American myrmecologist (a person who studies ants) William Morton Wheeler in 1902. Because ethology is considered a topic of biology, ethologists have been concerned particularly with the evolution of behaviour and its understanding in terms of natural selection. In one sense, the first modern ethologist was Charles Darwin, whose 1872 book "The Expression of the Emotions in Man and Animals" influenced many ethologists. He pursued his interest in behaviour
History of emotions historiographical approaches such as conceptual history, historical constructivism and the history of the body. Similar to the sociology of emotions or anthropology of emotions, the history of emotions is based on the assumption that not only the expression of feelings, but also the feelings themselves are learned. Culture and history are changing and so are feelings as well as their expression. The social relevance and potency of emotions is historically and culturally variable. In the view of many historians, emotion is, therefore, just as fundamental a category of history, as class, race or gender. A number of different methodological approaches