The book "On the Origin of Species according to The Westminster Review, April 1860" by Thomas Henry Huxley is one of the most significant philosophical works of the 19th century. In this work, the author considers and analyzes the theory of natural selection, which has become the basis of modern evolutionary biology. Huxley carefully examines natural selection as a key mechanism for the evolution of the organic world, providing clear examples from nature and explaining the rationale for his theory. In his book "The Origin of Species", Huxley provokes the reader to think about the role of natural selection in the development of life on Earth, causing discussions and re-evaluation of known views on natural processes. His work became an important contribution to science and philosophy, and also opened new horizons for research in the field of biology and genetics.