"Fundamental Philosophy, Volume IV" is the fourth volume of the outstanding work of the Spanish philosopher and writer Jaime Luciano Balmes. In the book, the author examines the main problems of our time through the prism of a philosophical approach to community, morality, faith and truth. Balmes analyzes the essence of human existence, the leading place of faith in the modern world and the impact of scientific progress on society. The book not only examines the problems of our time, but also offers deep reflections and conclusions that leave the reader with new views on the world around. "Fundamental Philosophy, Volume IV" is an important work that makes us think about the essence of the modern world and the role of man in it.