"Principles of Biology, Volume 2" is the second part of the edition of the famous scientific work of Herbert Spencer, who is one of the key philosophers and biologists of the 19th century. In this book, the author examines important aspects of the nature of the living world from the point of view of the theory of evolution, examining in detail the laws governing the life of organisms. He reveals to the reader the mysterious interrelationships between different forms of life, develops the concepts of survival and selection, and also introduces new ideas into biological science. The book "Principles of Biology, Volume 2" is an important source of knowledge for anyone interested in biology, evolution, and the philosophy of nature. Reading it will help to better understand the complex processes in the world of living beings, as well as deepen your knowledge about the evolutionary development of various organisms.