Choose a Pope
There were many "causes" of the sixteenth century Protestant Reformation, but certainly one was that people generally lost patience with the corruption of papal authority. Some notable scholars began to openly criticize the popes (e.g. John Wycliffe 1320-1384 and his followers the Lollards, and Erasmus of Rotterdam 1466-1536 In Praise of Folly). In the years leading up to Martin Luther, the Catholic Church had three rival popes - at the same time. At the ecumenical council of Pisa held June 5, 1409 an attempt was made to end the Western Schism by deposing Popes Gregory XII (Rome) and Benedict XIII (Avignon) because they were notorious: “notorious schismatics, promoters of schism, and notorious heretics, errant from the faith, and guilty of the notorious and enormous crimes of perjury and violated oaths.” The solution worked out by the Cardinals was to elect a third pope, Alexander V. Western Catholicism was then divided into parties with separate popes until the Council of Constance (1414-1418) which then forced the competing popes to resign in favor of one pope: Martin V. It was at the first Vatican Council in 1870, that the Roman Catholic Church formally declared that popes are infallible in matters of faith and morals.
Protestants do not find the primacy-of-Peter in the Bible, neither do we recognize a centralized authority with permission to mix biblical and unbiblical teachings (magisterium) to instruct Christians about what to believe. The Protestant Reformation was based on the Bible at our primary authority (sola Scriptura), what Alister McGrath calls “Christianity’s Dangerous Idea.” God appointed the Bible as the sole instrument through which he reveals the way of salvation to the church, which means that “the biblical text would have to be sufficiently comprehensive and sufficiently self-explanatory, under the inspiration of the Holy Spirit, to effect this purpose. If such were the case, the clerical leadership of the church would then derive their authority from the degree of their faithfulness to Scripture’s saving teachings and not the other way around” (Ashley Null, “Thomas Cranmer and the Anglican Way of Reading Scripture”).
Christianity’s Dangerous Idea: The Protestant Revolution, Alister McGrath
Reformation Anglicanism: A Vision for Today’s Global Communion, Ed. Ashley Null & John Yates III