No one has contributed more to the understanding of human evolution than Charles Darwin, whose theory of evolution overturned the Victorian era's assumptions, radically changed our perceptions of life on Earth, and continues to be attacked today by followers of all religions.

In this edition, the chapters of Natural Selection from "On the Origin of Species" are published, which is one of the most important books of all time. Using a wealth of evidence, Darwin defends the idea (which others before him had also supported) that species evolve, discovering a mechanism that makes such evolution possible. He argues that life is like a tree in which, as its roots develop, different branches, the species, are formed, which, over time, continue to differentiate, leading to the creation of new species under the influence of certain limiting factors.