Real work prof. O. Balzer stands in close connection with the recently published work of the pre-doc in the Russian translation. S. Kutsheba: "An essay on the history of the socio-state system of Poland." Book prof. Balzer - a critical analysis of the book of Mr. Kutsheba and at the same time the revision of a number of major questions on the history of the Polish system; it arose from the processing of several articles that appeared in the Kwartalnik historyczny magazine and later required a well-known change in view of the subsequent response of Kutsheba to some of these articles.