The book "The Contribution of Auguste Comte and Herbert Spencer to the History of Philosophical Ideas of the 19th Century" by Eugene Roberty is a historical work that examines the influence of two outstanding philosophers on the philosophy and scientific disciplines of their time. The author reveals the key ideas and concepts of these thinkers, analyzes their interaction and contribution to solving the current problems of the era. The book examines Auguste Comte's views on the concept of sociology as a science and his system of "positivism", as well as Herbert Spencer's teachings on evolution and social processes. The author reveals in detail the life and intellectual path of both philosophers, their mutual influence and importance for the development of philosophy. "The contribution of Auguste Comte and Herbert Spencer to the history of philosophical ideas of the 19th century" is a valuable scientific work that helps to better understand the context and significance of the thoughts of these outstanding philosophers for the development of human knowledge and culture.