"If evolutionary biologists, ethical philosophers, and social media gurus are to be believed, the face is the basis for what we call 'humanity.' The face is considered the source of identity, truth, beauty, authenticity, and empathy. It underlies our ideas about what constitutes a human, how we relate emotionally, what is pleasing to the eye, and how we ought to treat each other. But all of this rests on a specific image of the face. We might call...