More than a century and a half prior to Luther's historic act at Wittenberg, the University of Oxford's distinguished scholar John Wycliff was engaged in his own full-scale war on the institutions and practices of medieval Christendom. This vitriolic theologian from Yorkshire blasted the Pope as ""anti-Christian and a devil . . . the father of lies""; the cardinals were full of ""foul pride,"" the ""Caesarean"" secular clergy were ""traitors of God...