The book "The Practice and Theory of Bolshevism" was written by the outstanding English philosopher and writer Bertrand Russell. In this work, he analyzes the history and essence of Bolshevism, revealing its theoretical principles and practical application. Russell examines in detail the ideology and methods of the Bolsheviks, highlights their influence on society and politics. In addition, he analyzes the possibilities of introducing Bolshevism in different countries and the dangers it carries. This book is an important document for understanding the history of political ideas and conflicts of the 20th century.