Why does the Russian soul seem to the world "mysterious"? The stadial formation of character (soul) of Russian people and character of man is compared. Just as the character of an adult person is determined by genes and environment, the character of the people - by natural data and historical conditions. The natural data of the Russians were excellent, but the early teenage psychological trauma at baptism and further unfavorable historical circumstances led to the fact that the Russian people, having moved on to adult life, remained teenagers. And "adult teenagers" are a mystery to a mature mind. For a wide range of readers.