I'm reading a wonderful book by Nicholas Carr, The Shallows, about what the internet has done to our thinking.
It starts with the dim history of the development of reading and writing. Imagine how amazing it must have been centuries ago, with someone saying, "I saw something weird - a guy was reading silently, without even moving his lips" or "I just heard that there are a few people with this new idea of putting a space between words to make it easier to read."
The Shallows: What the Internet Is Doing to Our Brains
The Shallows | Nicholas Carr | W. W. Norton & Company