Access to books was lousy for anyone who lived in Podunk, because in the twentieth century (and the sixteenth, for that matter), keeping books in stock presented the same problem as keeping pots or shoes in stock. They had to be created in advance of demand and delivered someplace for sale. The limitations imposed by physicality and geography are so normal that people rarely mention them, but they create persistent barriers to access for anyone other than well-off urbanites.

It’s easy to see this as same old, same old, of course. Richer people in fancier cities have nicer things — surprise! — but given recent technology, those barriers could be lowered. Demand can now create supply, in the form of ebooks and print on demand. This turns books into a different sort of commodity. No book need ever be out of stock, or out of print, anywhere in the world. It used to be that if you were OK with people in Podunk having inferior access to books, you were just a realist about the difficulties of making and shipping physical stuff. Now if you’re OK with that, you’re kind of an asshole.

—Clay Shirky