Wyclif's ideas caused a major upheaval both in the country of his birth and in the Bohemian area of central Europe; that upheaval affected theological, ecclesiastical and political developments from the late 14th to the early 16th centuries. Some of those ideas were transmitted orally through Wyclif's university teaching in Oxford, and in his preaching in London and Lutterworth, but the main medium through which his message was disseminated was the...