Many moments that humans see naturally suggest something other than themselves. This is a legacy from the remotest time. Among animals, movements of prey and predator give each an indication of what may happen next and a basis for choosing their own actions. As species evolved, the movements that could be made and the meanings that could be suggested in those movements became increasingly sophisticated. Among the higher primates, grooming, aggressive and submissive displays, begging, and other movements regulate complex social interactions. Humans also interpret movements; they inform us of what others do, what happens to things, and how a movement maker feels--all this is instinctive. (Contains 17 endnotes.)