many descriptions of life in the early 1400s, the era before movable type. Literacy was limited, the Catholic Church was the pan-European political force, Mass was in Latin, and the average book was the Bible. She was also able to find endless descriptions of life in the late 1500s, after Gutenberg's invention had started to spread. Literacy was on the rise, as were books written in contemporary languages, Copernicus had published his epochal work on astronomy, and Martin Luther's use of the press to reform the Church was upending both religious and political stability.