Book "Conditions of Existence Affecting the Preservation of Living Beings. Lecture V (of VI). "Lectures for Workmen", at the Museum of Practical Geology, 1863, on Darwin's work: "The Origin of Species" by Thomas Henry Huxley. In this book, the famous British naturalist and biologist Thomas Henry Huxley gives a lecture on how environmental conditions affect the survival of living things. The author analyzes Charles Darwin's work "The Origin of Species" and reveals important aspects of its importance for the development of scientific ideas about evolution. interesting conclusions and fascinating examples that make this book indispensable for understanding the principles of natural selection and the evolution of species.