The formation of the Russian centralized state in the XIV-XV centuries? one of the most important and complex phenomena of Russian history However, both pre-revolutionary and Soviet historiography practiced a one-sided assessment of this era exclusively from the standpoint of “we cheer for Moscow!” Any actions leading to the strengthening of the Moscow principality were considered by historians as progressive and ethically justified, and any opposition to them as a manifestation of reaction and even as a betrayal of the national interests of Russia. But one cannot judge the events of the past with the help of modern concepts and ethical attitudes or from the standpoint of momentary political conjuncture. Each side had its own truth, which is sometimes difficult to see. The authors show readers behind-the-scenes political struggle of the era of the Kulikovo battle . Was there a Tatar-Mongol yoke in Russia? When and where was the dream of a single Russian state born? Was Metropolitan Alexy really a "Russian Richelieu?" Who provoked the Battle of Kulikovo? Was Oleg Ryazansky a traitor to the Russian land? Who was at the head of the conspiracy against Dmitry Donskoy? Who prevented the unification of all Russian lands at the end of the XIV century? Khans and Princes : The Golden Horde and the Russian Principalities . Indo-Europeans of Eurasia and Slavs. Secrets of the Dark Ages. Secrets of the Russian Khaganate . Mysteries of the Russian Interregnum . The Last Rurikovich and the Decline of Moscow Russia . Slavic Europe V - VI centuries . Conquest of Siberia . From Ermak to Bering