the notion of a mathematical structure, and in anthropology by Claude Lévi-Strauss, who sought to describe rules governing human behavior. According to Aczel, Trubetzkoy's focus in Principles of Phonology was the study of phonemes and their opposing aspects to describe rules of language, the goal of describing general underlying rules being the common goal of structuralism. Notes References Anderson, Stephen R. (1985). Phonology in the Twentieth Century. Theories of Rules and Theories of Representations. Chicago: The University of Chicago Press. pp 83–116. Intellectual Biography of Nikolai Trubetzkoy at the Gallery of Russian Thinkers (International Society for Philosophers) 1890 births 1938 deaths Writers from Moscow People from Moskovsky Uyezd Nikolai Trubetzkoy Russian princes Expatriates from the Russian Empire in Germany Linguists from the Russian Empire Phonologists Eurasianism Soviet emigrants to Bulgaria Bulgarian emigrants to Austria Moscow State University alumni Imperial Moscow University alumni Academic staff of Sofia University People of the Prague linguistic circle 20th-century linguists