The other day I was watching a movie about cave paintings, and the narrator kept referring to the ancient murals as “art.” It got me thinking—did Stone Age humans draw pictures on the walls of caves out of some inherent desire to artistically express themselves, or were they really just making prehistoric memes ? Think about it. Memes are essentially a visual language used to communicate an idea to lots of strangers, the point being mass consumption of the message rather than credit to the auth…