text: Among the goals of ethnology have been the reconstruction of human history, and the formulation of cultural invariants, such as the incest taboo and culture change, and the formulation of generalizations about "human nature", a concept which has been criticized since the 19th century by various philosophers (Hegel, Marx, structuralism, etc.). In some parts of the world, ethnology has developed along independent paths of investigation and pedagogical doctrine, with cultural anthropology becoming dominant especially in the United States, and social anthropology in Great Britain.  The distinction between the three terms is increasingly blurry. Ethnology has been considered an academic field since the late 18th century, especially in Europe and is sometimes conceived of as any comparative study of human groups.
  The 15th-century exploration of America by European explorers had an important role in formulating new notions of the Occident (the Western world), such as the notion of the "Other".  This term was used in conjunction with "savages", which was either seen as a brutal barbarian, or alternatively, as the "noble savage". Thus, civilization was opposed in a dualist manner to barbary, a classic opposition constitutive of the even more commonly shared ethnocentrism. The progress of ethnology, for example with Claude Lévi-Strauss's structural anthropology, led to the criticism of conceptions of a linear progress, or the pseudo-opposition between "societies with histories" and "societies without histories", judged too dependent on a limited view of history as constituted by accumulative growth.
  Lévi-Strauss often referred to Montaigne's essay on cannibalism as an early example of ethnology. Lévi-Strauss aimed, through a structural method, at discovering universal invariants in human society, chief among which he believed to be the incest taboo. However, the claims of such cultural universalism have been criticized by various 19th- and 20th-century social thinkers, including Marx, Nietzsche, Foucault, Derrida, Althusser, and Deleuze.