The development of the seemingly simple cultural invention of reading alters the brain of each literate individual, propulses the intellectual development of the species, and provides human beings with a history of past knowledge as a foundation for future thought. Understanding how this happened in the species provides unexpected lessons for how children learn, how teachers teach, and how the brain learns anything new. Understanding the intrinsic plasticity of the reading brain circuit provides a cautionary tale for examining the cognitive impact of different media on how we read and how we think.