The book by Harvard University professor Anatoly Alekseevich Klesov is a real scientific bestseller. For three centuries, scientists could not give a substantiated answer to the questions: who are the Slavs, what is their origin and where did they come from? The author, being a highly professional specialist and talented researcher, found the answers to them at the intersection of two sciences - history and genetics. The book written by A.A. Klesov, has the effect of a bomb exploding - the reader is in for a shock. The author destroys the Russophobic taboo that has developed in the scientific community on studying the history of the ancient Slavs and their origins from the Aryans - the indigenous inhabitants of the Russian Plain.