Where does all this design come from? From evolution by natural selection, of several kinds: genetic, intracranial, cultural. First, life evolved and refined itself over several billion years of natural selection. Single-celled organisms—archaea and bacteria—solved the fundamental problem of reproduction, creating and optimizing the genetic code of DNA, the copy-machine ribosomes, the motor proteins, and other elegantly designed mechanisms. Then the eukaryotic revolution gave birth to specialized cells, of greater complexity, the first and most important instance of “technology transfer,” which multiplied the talents of single cells by orders of magnitude, permitting them to come together in multicellular organisms that could discover, through evolution in their own brains, still further good tricks for surviving and thriving in an ever more complicated world, leading eventually to a species, the well-named Homo sapiens, that wasn’t just competent but capable of (imperfect but growing) comprehension of the sources and explanations of its own competences. Our species was able not only to notice its own noticings but also eventually to analyze them and share the analyses with conspecifics, thanks to language. And how did language arise? It too is brilliantly designed and almost all of that design must have come from R & D processes over millions of years by agents who did not yet understand what they were doing and why. Cultural evolution by natural selection of memes added a faster, more bountiful generator of design, which gave human beings more degrees of freedom than were enjoyed by any other living things—along with the problem of how to control those degrees of freedom. Dealing with that problem turns into the problem of what to think about next, and that is what generates the stream of consciousness.