Why are there different races?
Human genetic diversity does not originate from "different races" but from the influence of geographical environment and migration. Environmental stresses in different regions, such as UV intensity and disease prevalence, promote genetic mutation and natural selection. The accumulation of these small differences creates the phenotypic diversity we see rather than distinct "races." Therefore, the dualistic concept of "race" should be abandoned, and the common origin and evolution of human beings should be valued.