"Candide, or Optimism" is a philosophical and satirical novel by the outstanding French writer Voltaire, written in 1759. In this book, the author sharply and ironically satirizes the optimistic teaching about harmony in the world, exploring the life adventures of the main character - young Candide. The book explores many important themes such as justice, evil, faith, love and humanism, and leaves the reader with an idea of the essence of human nature and the world as a whole. "Candide, or Optimism" remains a relevant work that helps to understand complex aspects of life and morality.