Anthropologists start by classifying human evolution into ages: the Stone Age, the Bronze Age, the Iron Age, etc. Looking at more modern scientific achievements, they talk about electricity, the automobile, television, the computer and now the Internet – things that everybody must have. (Imagine prehistoric times with Mrs. Ugg saying to her husband, “Grak’s wife in the next cave has a flint knife. Why don’t I have one?”)

Now let’s look at the current “latest thing,” the photograph.