The main cause of the Protestant Reformation initiated by Luther was the protest against clergy abuse. The crux of the criticism was the sale of indulgences, that is, of divine forgiveness to those who could pay. From there, he suggested the proposal for reform of Roman Catholicism from the change in points of Catholic doctrine based on what Martin understood as a return to the holy scriptures.
Although it had initial religious motives, the Protestant Reformation has always been rooted in causes of social and political imprint.