Movable type printing machine

This marvelous machine developed by gutenberg in 1439 allowed the spread of the written word to the world. Why would this be important being so far away in time? If we think about it, books used to be THE source of knowledge in those inimaginable times when the iternet had not even been thought to be invented yet. Throughout time books have been not only source of knowledge but also an important way to spread ideas, to develop critical thinking and to preserve culture. We now know about ancient cultures and history of the world because someone, somewhere thought of having a written record of what was going on. Even if we have the marvelous invention of the internet now, the information we can find on it has to come from somewhere. Have you ever asked yourself where this continous flow of information started? Can you imagine a world where information cannot be expresed or spread quickly and effectively? A lot of "revolutions", that I know about, wouldn't have been possible if the flow of information had been as slowas it was before the movable type printing machine had been invented