It was intended to allow ships at sea to communicate with people on land. Radio, like any technology, can be used for good or evil. The more powerful a technology, the more good or the more evil it can usually cause. Fire still claims the lives of many people, but we have not yet given up that technology. You walk into a library and it feels as if all the world is at hand.
Books act as windows to other lands and other times.
They explain how to do things and who had done them. They let you go inside someone's mind to find out how people felt or what they hoped for. Books do all this, unless you are blind. Ray Kurzweil had invented a music synthesizer, which he developed with Stevie Wonder. Since Stevie is blind, they talked about how technology can help overcome handicaps.