A study of Russian publications in the 1990s found that some 39 percent of all nonfiction published in Russia in that decade had something to do with the occult.
That is from the really quite interesting The Russian Cosmists: The Esoteric Futurism of Nikolai Fedorov and His Followers, by George M. Young. And for more on Russian Cosmism, you might try reading this collection. It is interesting to get such a different perspective on the issues raised by Bostrom, Hanson, Balaji, Musk, and the longevity writers, among others. I don’t believe any of those thinkers would be happy with these Russian discussions, but…I suppose that’s the point!