John Wycliffe and in his sermons, but also in a series of sharp tracts and polemical productions in Latin and English (of which those issued in his later years have been collected as "Polemical Writings"). In the 1380 "Objections to Friars", he calls monks the pests of society, enemies of religion, and patrons and promoters of every crime. He directed his strongest criticism against the friars, whose preaching he considered neither scriptural nor sincere, but motivated by "temporal gain". While others were content to seek the reform of particular errors and abuses, Wycliffe sought nothing less than the extinction of the institution
John Wycliffe throughout the realm by "poor priests" appointed by Wycliffe (mostly laymen). The preachers didn't limit their criticism of the accumulation of wealth and property to that of the monasteries, but rather included secular properties belonging to the nobility as well. Although Wycliffe disapproved of the revolt, some of his disciples justified the killing of Simon Sudbury, Archbishop of Canterbury. In 1382 Wycliffe's old enemy William Courtenay, now Archbishop of Canterbury, called an ecclesiastical assembly of notables at London. During the consultations on 21 May an earthquake occurred; the participants were terrified and wished to break up the assembly, but Courtenay