The book "Theory of Evolution, Volume 2 of 2" was written by the outstanding German biologist August Weissmann. In this second part, the author examines the main aspects of the theory of evolution, paying attention to the mechanisms of natural selection, the choice of species in living organisms, and the changes that occur in the genetic code during evolution. Emphasizing the importance of the study of microevolution in understanding the general patterns of species evolution, Weissmann makes complex scientific concepts comprehensible to a wide range of readers. The book "The Theory of Evolution, Volume 2 of 2" will be a useful addition to the library of anyone interested in the natural sciences and evolutionary processes.