The book "History of Modern Philosophy" by the famous author Alfred William Benn is an important source for studying the development of philosophical thought from the 17th to the 19th centuries. In its pages, the reader will find a detailed overview and justification of the key philosophical directions and ideas of that time, such as rationalism, empiricism, idealism, positivism, and irrationalism. The author analyzes in detail the contribution of prominent philosophers, such as Descartes, Berkeley, Hegel, Kant, Mill, Kierkegaard, Darwin and others, to the formation of the philosophical picture of the world in the modern period. This book not only reflects the essence of the philosophical discussions of that time, but also helps to understand important moments in the development of philosophy that have a reflection in the modern world.