The invention of movable type made books less expensive. People started to demand the Bible in their own language, as beforehand, the book was predominantly available in Latin. As more people started to read the Bible, they started to rebel against the excesses of the Catholic Church. The Protestant Reformation would not have been possible without the invention of movable type.
The invention also had secular implications as well. More people learned to read and they demanded books in their own language. The period after the invention of the printing press saw the rise of English, French, and German as languages. Writers wrote about plays, manners, and the correct role of government. They also wrote some of the first popular novels. As people read books in their own language, they started to develop a sense of nationalism. People saw themselves less as members of Christendom but more like members of a certain country.