Ideal type (), also known as pure type, is a typological term most closely associated with sociologist Max Weber (1864–1920). For Weber, the conduct of social science depends upon the construction of abstract, hypothetical concepts. The "ideal type" is therefore a subjective element in social theory and research, and one of the subjective elements distinguishing sociology from natural science. Meaning An ideal type is formed from characteristics and elements of the given phenomena, but it is not meant to correspond to all of the characteristics of any one particular case. It is not meant to refer to perfect things, moral ideals nor to statistical averages but rather to stress certain elements common to most cases of the given phenomenon. It is also important to pay attention that in using the word "ideal" Max Weber refers to the world of ideas (, "mental images") and not to perfection; these "ideal types" are idea-constructs that help put the seeming chaos of social reality in order. Weber himself wrote: "An ideal type is formed by the one-sided accentuation of one or more points of view and by the synthesis of a great many diffuse, discrete, more or less present and occasionally absent concrete individual phenomena, which are arranged according to those onesidedly emphasized viewpoints into a unified analytical construct..." It is a useful tool for comparative sociology in analyzing social or economic phenomena, having advantages over a very general, abstract idea and a specific historical example. It can be used to analyze both a general, suprahistorical phenomenon such as capitalism or historically unique occurrences such as in Weber's Protestant Ethics analysis. To try to understand a particular phenomenon, one must not only describe the actions of its participants but "interpret" them as well. But interpretation poses a problem for the investigator who has to attempt to classify behavior as belonging to some prior "ideal type". Weber described four categories of "Ideal Types" of behavior: zweckrational (goal-rationality), wertrational (value-rationality), affektual (emotional-rationality) and traditional (custom, unconscious habit). Weber, who is keenly aware of the fictional nature of the "ideal type", therefore states that it never seeks to claim its validity in terms of a reproduction of or correspondence with social reality. Its validity can be ascertained only in terms of adequacy, which is too conveniently ignored by the proponents of positivism. This does not mean, however, that objectivity, limited as it is, can be gained