A simple smile: “A pleased, kind, or amused facial expression, typically with the corners of the mouth turned up and the front teeth exposed.” Surprisingly physically close to but opposite in meaning from a grimace. A social expression of the face learned very early in infancy, used to further bond the infant to caretaker and vice versa.

In a utopian future, it is often assumed that everyone would smile; in a dystopian future, it is often assumed that everyone would grimace, an assumptio...