But reasons are things for us. They are the very tools and objects of top-down intelligent design. Where do they come from? How do they get installed in our brains? They come, I am now at last ready to argue in some detail, via cultural evolution, a whole new process of R&D—less than a million years old—that designs, disseminates, and installs thinking tools by the thousands in our brains (and only our brains), turning them into minds—not “minds” or sorta minds but proper minds.
