>>20810950Humans have more variation in appearance because of our social evolution. Like the gay animal meme is just because those animals have far weaker sexual dichotomy than we do. We’ve adapted variability of facial features for the reason that differentiation improves our ability to socialize with one another as well as expands the amount of information (like whether someone is healthy or sick, trustworthy or untrustworthy) that we can gain through our more limited perceptive senses.
