is plain and clear." The formal-functional is essentially the synchronic approach advocated by Alfred Radcliffe-Brown and Bronisław Malinowski, attempting to discern the formal structure of a society and the functional interrelations of its components. The evolutionist approach is, like the formal approach, generalizing; but it is also diachronic, seeing particular events as general instances of larger trends. Boas claimed his science promised complex and interdependent visions of culture, but White thought that it would delegitimize anthropology if it became the dominant position, removing it from broader discourses on science. White viewed his own approach as a synthesis of historical and functional approach because it combined the diachronic scope of one with the generalizing eye for formal interrelations provided by the other. As such, it could point out "the course of cultural development in the past and its probable course in the future" a task that was anthropology's "most valuable function". This stance can be seen in his views of evolution, which are firmly rooted in the writings of Herbert Spencer, Charles Darwin, and Lewis H. Morgan. While it can be argued that White's exposition of Morgan and Spencer's was tendentious, it can be safely said that White's concepts of science and evolution were firmly rooted in their work. Advances in population biology and evolutionary theory passed White by and, unlike Steward, his conception of evolution and progress remained firmly rooted in the nineteenth century. For White, culture was a superorganic entity that was sui generis and could be explained only in terms of itself. It was composed of three levels: the technological, the social organizational, and the ideological. Each level rested on the previous one, and although they all interacted, ultimately the technological level was the determining one, what White calls "The hero of our piece" and "the leading character of our play". The most important factor in his theory is technology: "Social systems are determined by technological systems", wrote White in his book, echoing the earlier theory of Lewis Henry Morgan. White spoke of culture as a general human phenomenon, and claimed not to speak of 'cultures' in the plural. His theory, published in 1959 in The Evolution of Culture: The Development of Civilization to the Fall of Rome, rekindled the interest in social evolutionism and is counted prominently among the neoevolutionists. He believed that culture–meaning the total of all human cultural activity on the planet–was evolving. White differentiated