Britannica Sources used in this answer

Why did Darwin consider intelligence important to human evolution?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Svante Paabo stands smiling with one hand on a Neanderthal skeleton model in front of a blue Max Planck Institute for Evolutionary Anthropology banner. — Anthropology Max Planck Institute for Evolutionary Anthropology director Svante Pӓӓbo posing with a model of a Neanderthal skeleton.

In his 1871 work, The Descent of Man and Selection in Relation to Sex, Charles Darwin identified a relatively large brain size as the defining characteristic of the human species.1

Darwin considered intelligence to be a critical evolutionary advantage because it provided the foundation for two essential human capabilities: language and technology. By enabling these developments, intelligence allowed humans to adapt to their environments and navigate the challenges of survival more effectively than other species.1

This perspective positioned intelligence not merely as a biological trait, but as a functional tool that drove human progress. Darwin’s focus on the adaptive value of cognitive faculties laid the groundwork for evolutionary psychology, which explores how the human mind and its basic ingredients of cognition—such as logic, mathematics, and the understanding of cause and effect—were shaped by natural selection to solve recurring problems in the physical environment.23