The book "The Psychology of Socialism" was written by Gustave Lebon more than a hundred years ago, but even today it continues to excite the minds without losing its relevance. The author managed not only to consistently, reasonably and impartially present the theory and main provisions of socialism, but also to soberly assess its impact on humanity, being one of the first to see the destructive essence of this phenomenon. The book has withstood numerous reprints and today is considered one of the fundamental philosophical texts, mandatory reading for anyone who seeks to broaden their horizons and understand the essence of the concept of "socialism".