Evolução e Raças Humanas

The document discusses the concept of human races and whether races can be clearly defined from a biological perspective. It notes that while early scientists proposed various systems of racial classification based on physical traits, there was little consensus on how many races exist or how to define them. Modern genetic studies have failed to find clear genetic boundaries between human populations that would support the existence of distinct, relatively isolated biological races. Overall patterns of human genetic diversity appear to be distributed in a gradient based on geography rather than showing evidence of long isolation, pointing to gene flow rather than isolation as the main evolutionary force shaping human genetic variation.