The Fruits of Philosophy: A Treatise on the Question of Population is an outstanding work by Charles Knowlton that was published in 1832. In this book, the author examines the problem of population regulation and the impact of modernization on society. Knowlton examines the economic and social aspects of population growth, offering his own opinions and recommendations for reducing overpopulation and improving the living conditions of society. The book "Fruits of Philosophy" remains relevant even today, posing important questions to the reader about the role of man in society and the need for balanced population growth.