"Guest from Altruria" is a philosophical novel by the American writer Robert Heinlein, which opens the unique world of an ideal society to the reader. In this book, the author reveals the ideas of brotherhood, mutual assistance and the absence of conflicts, and also provokes the reader to think about the possibilities of a harmonious life on Earth. Through the adventures of the main character, who arrives on a planet with beautiful customs and values, the reader gets the opportunity to rethink his views on society, morality and his own place in this world. "The Guest from Altruria" is a book that captivates with its fantastic atmosphere and at the same time inspires great thoughts and discussions.