He believed that this might come about through closer relations between Slavic Catholicism and the Russian Orthodox Church, and supported the idea that all Slavs had a common language and ethnic origin.
[8] He considered that the only possible role for the tsar to 'correct' or unify the orthography and script used in Slavic-language books and awaken Slavic consciousness was through works conducive to education and logic.
In extremis the South Slavs might join with the Russian tsar as a sovereign of the same language and people if the Catholic rulers supported his leadership in a war against the Ottomans.
After lengthy travels and fifteen years of exile in Siberia, Križanić died, misunderstood and disappointed, in battle during the Ottoman siege of Vienna in 1683.
Possible explanations put forward have included the fact that he was a Roman Catholic priest, his criticism of Russian society and of the Greeks, with whom Patriarch Nikon of Moscow (in office: 1652-1666) was attempting reconciliation, and other political and social motives.
In these books, written in his self-devised "Common Slavonic language" (a Pan-Slavonic grammar named Grammatitchno Iskaziniye that incorporated numerous Slavic languages), he set forth a comprehensive program of reforms proposed for the Russian state, including reforms to public administration, Russian serfdom, economic policy, education, grammar, and Russia's primitive agricultural system.
Križanić's Politika which he wrote between 1663 and 1666, was published by Peter Bezsonov (Russia in the Seventeenth Century, 1859–60) and for the first time in English in 1985,[1] and is his most well-known and influential work.
His five principles were: Full autocracy (essentially absolute monarchy), closed borders, compulsory labor or a ban on idleness, government monopoly of foreign trade, and ideological conformity.
[17] The autocrat should use his power to eliminate bad customs, modernize the country and give the nobles and clergy privileges on the model to the Western Ständestaat.