During the 19th century an interpretive model of the relationship between religion and science known today as the conflict theory developed, according to which interaction between religion and science almost inevitably leads to hostility and conflict. A popular example was the misconception that people from the Middle Ages believed that the Earth was flat, and that only science, freed from religious dogma, had shown that it was spherical. This thesis was a popular historiographical approach during the late 19th and early 20th centuries, but most contemporary historians of science now reject it.