Pulp
A small change in the way paper was made lead to a huge change in what you can read.
And the weird part is that it all starts with an execution and ends up with people on Mars. Of course, if people hadn’t got better at reading, it might not have made a difference. But they did, thankfully, and now you can dream about swinging from tree to tree, or sailing the seven seas. Really. Go ahead. It’s okay.