Edited and introduced by Robertino Ghiringhelli. E.Albertoni, S.Koff, M.Czudnowski, G.Field, J.Higley. This volume presents some of the most important researches about the relationship between political elitism as it is conceived in the first instance by Gaetano Mosca, Vilfredo Pareto and Roberto Michels and its further developments in the English-speaking American background. This research is set up by E.Albertoni and it is directed and carried out at State University of Milan, Faculty of Political Sciences, Juridical Institute.