Interview on the Israeli state radio channel Reka in connection with the release of the book “Ethnos of Millennia”. The author is the founder of the Institute of Jewish Family History “Am haZikaron” Alexander Yonatan Widgop – writer and winner of the “Zeiti Yerushalayim” award for his contribution to the development of the national spiritual heritage. The interview focuses on the preservation of personal characteristics in Jewish families over the centuries. The interview is conducted by the famous host Igor Kharif, with the participation of Prof. Yitzhak Fukson, professor of physics of complex systems.