"The aim of this paper is to introduce one of the classical sociological research conducted by Paul F. Lazarsfeld and Elihu Katz in the city of Decatur (Illinois) in the Midwest of United States in 1955. The subject of the research was nonformal everyday interpersonal influence in areas of marketing, fashion, public affairs and movie going and the object was the population of women older 16 years (n = 718). By means of indicators of life cycle, social status and gregariousness the research report describes the profiles of opinion leaders in given areas and provides an answer to question if the two step flow of communication hypotheses is applicable in mentioned spheres of social life." (author's abstract)
This study concentrates on the analysis of social structure of medieval society and accordingly on the acquisition of knowledge (1) about their orderliness, (2) inner processes (3) and least partially their influence on the process of formation of West civilization. In the next sequence article deals with development medieval structure in the context Elias civilization's theory as well as and closely knots on the inquiry of distinguished contemporary medievalists, mainly G. Duby, J. le Goff, A. Gurevič, F. Cardini, M. Bloch, etc. In addition, submitted study focuses on deeply understanding specific structure of medieval society through application binary and dichotomous approaches, theory of three orders, also theory of feudalization. In the end the research is attending on the phenomena of knighthood and the process of formation of the courtly society.