and the Age of Enlightenment. This was accompanied by a growth in nationalism across Europe, as intellectuals began to assert their own national heritage. In 1818, the Polish ethnographer Zorian Dołęga-Chodakowski (Adam Czarnocki; 1784–1825) in the work O Sławiańszczyźnie przed chrześcijaństwem ("About the Slavs before Christianity") declared himself a "pagan" and stated that the Christianisation of the Slavic peoples had been a mistake. Therefore, he became a precursor of the return to Slavic religion in Poland and all Slavic countries. Similarly, the Polish philosopher Bronisław Trentowski (1808–1869) saw the historical religion of the Slavs as a true path to understanding the divine creator, arguing that Christianity failed to do so. In Czechia, in 1839, the doctor and teacher Karel Slavoj Amerling (1807–1884) founded the Brotherhood of the Faithful of the New Slavic Religion (Bratrstvo Věrníků Nového Náboženství Slávského), identified as pantheism and as a means for the Czech National Revival; the group was, however, banned by the Austrian rulers just one year later, in 1840. Another precursor in Poland was Jan Sas Zubrzycki (1860–1935), who elaborated the doctrine of "God-Knowing" (Bogoznawstwo). It was this Romantic rediscovery and revaluing of indigneous pre-Christian religion that prepared the way for the later emergence of Rodnovery. Whereas calls to re-establish pre-Christian belief systems existed within the German and Austrian far-right nationalist movements during the early twentieth century, in Russia the situation was different. In Russia there was a shared belief among the intellectual circles that Slavic paganism had survived within the "folk Orthodoxy" of the common people (which was regarded as a dvoeverie, a "double faith"), and the Old Believers' movements. The study of this syncretic popular religion and philosophy was the foremost interest for late nineteenth and early twentieth-century Russian intellectuals: early revolutionaries (Alexander Herzen, Nikolay Ogarev, Mikhail Bakunin), Narodniks (Populists), and early Bolsheviks were inspired by the radical forms of society practised within folk religious communities, which in many ways were precursors to socialism. Vladimir Bonch-Bruyevich was assigned by the Russian Social Democratic Labour Party the task of studying folk religious movements, and in 1908–1910 a faction of the Bolsheviks, represented by Anatoly Lunacharsky, Alexander Bogdanov, Maxim Gorky, and Vladimir Bazarov, formulated the "God-Building" movement (Bogostroitelstvo), whose aim was to create a new religion for the proletariat through a synthesis of socialism with folk religion. 1930s–1950s: Early concrete developments In Ukraine, the first practitioners of Slavic Native Faith appeared in the 1930s.