The book "Letter to Louis XIV" is an outstanding work of moral philosophy and political journalism by the famous French writer Francois-Salignac de Lamothe Fénelon. In this letter, he addresses the King of France himself, Louis XIV, with his thoughts and advice on government, war, and justice. The author highlights the problems of social inequality, the oppression of the poor, and also calls for the professed faith and moral responsibility of state leaders. This book became a symbol of appeal to the authorities in the name of justice and harmony, which makes it relevant even today. Recommended for anyone interested in history, philosophy and politics.