This study aims to analyze and provide a historical and legal assessment of administrative, economic, and social transformations in Prussia in the first half of the 19th century to study the circumstances and conditions of the formation of a new political, legal, and economic reality of the country. Moreover, the role of specific personalities who made a mark in history during this period is explored to obtain an idea of what administrative, legal, and economic patterns they reshaped in the management system. The author focuses not on the transformations but on the personalities whose hands have produced those transformations (an objective series of events) in Prussian Germany. Reformers-researchers (first, Stein, Gardenberg, V. Humboldt) realized their own private interest, but the totality of personal interests was already of public interest, and they themselves acted as its subjects. The success of the reformation was also determined by the prevailing atmosphere in the country, which was filled with great philosophers, historians, and writers with their ideas and deeds. The author concludes that science in Germany was more than science. She actively participated in the process of transformation in the country.
 The author proves that the Prussian reformation, despite the different ideas of the participants about its goals, objectively contributed to the creation of the foundations of the bourgeois state on the basis of the monarchical form of government. As a legacy of the reformation stage, the Prussian statehood created in the second half of the 19th century was passed into the hands of Otto von Bismarck. Thus, it was not Bismarck who paved the way for Hitler. The reformers handed him a state building almost built according to their schemes which even the iron chancellor could not rebuild. In addition, we must consider that the modernization of Prussia developed in opposition to the counter-reformation, its legal expression was the so-called Carlsbad resolutions, which decelerated the dynamics of reforms.