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 one-sidedly emphsized viewpoints into a unified analytical construct...in its conceptual purity, this mental construct...cannot be found empirically anywhere in reality. (weber,1903-1917/1949:90)