Some Rodnovers do not acknowledge this practice of syncretism and instead profess an explicitly anti-syncretic attitude, emphasising the need to retain the "purity" of the religion and thus maintain its "authenticity". Other Rodnovers are conscious that the movement represents a synthesis of different sources, that what is known about ancient Slavic religion is very fragmented, and therefore the reconstruction requires innovation. Laruelle has thus defined Rodnovery as an "open-source religion", that is to say a religion which "emphasizes individual participation and doctrinal evolution, and calls for the personal creation of religious belief systems".