Robert Michels - Political Parties
http://gen.lib.rus.ec/book/index.php?md5=9A6922502CEF740CEBD8954CE05D5687
http://gen.lib.rus.ec/book/index.php?md5=BB3EC5F0FBE25CEC519F5B1449167366
https://en.wikipedia.org/wiki/Robert_Michels
>was a German sociologist and fascist who wrote on the political behavior of intellectual elites and contributed to elite theory. He is best known for his book Political Parties, published in 1911, which contains a description of the "iron law of oligarchy." He was a friend and disciple of Max Weber, Werner Sombart and Achille Loria. Politically, he moved from the Social Democratic Party of Germany to the Italian Socialist Party, adhering to the Italian revolutionary syndicalist wing and later to Italian Fascism, which he saw as a more democratic form of socialism. His ideas provided the basis of moderation theory which delineates the processes through which radical political groups are incorporated into the existing political system.