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🇪🇺AP European History

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2.2 Luther and the Protestant Reformation

Verified for the 2025 AP European History exam5 min readLast Updated on June 18, 2024

This topic and 2.3 Protestant Reform Continues both cover the major focus of this unit: the Protestant Reformation. Compared to 2.3, however, 2.2 is more about the causes of the Protestant Reformation. Although what truly caused the Protestant Reformation is a deep, complex topic, we’re going to be looking at an aspect of it: the major reformers of this era and the beliefs they would come to be associated with.

We'll be starting with the most well known of all: Martin Luther. 

Martin Luther

Martin Luther was a German monk. Records depict him as a dedicated religious scholar, who took questions of faith, especially on the topic of salvation, extremely seriously. 

In 1517, while working as a lecturer in the German city of Wittenberg, Martin Luther published his soon to be famous 95 Theses and posted them on the door of the Wittenberg Church. The 95 Theses were meant to start an academic debate on the sale of indulgences, documents that were supposed to allow one to buy their way out of purgatory.) The key word here is academic: contrary to the popular depiction of events shown below, Luther was not "throwing down the gauntlet," nor did he intend at the time to break with the Catholic Church. Indeed, documents were often posted on the door of the Wittenburg Church. 

However, despite his intentions, his 95 Theses would go on to permanently change the religious landscape of Europe forever. The document soon spread thanks to the power of the Printing Press, and by 1518 Martin Luther found himself embroiled in controversy. At the same time, Martin Luther himself had a series of religious revelations that solidified his thoughts on salvation being by divine grace alone: humans could not earn salvation (or pay for it through indulgences.) 

In 1521, Martin Luther was called to the Diet of Worms to explain himself. (Note that this event had nothing to do with eating grubs: a Diet was a term for assembly and the town the meeting was held in was called Worms.) There, he was given the opportunity to recant his now-deemed-heretical works, and he refused. 

Here I stand. I can do no other. God help me. Amen.

Martin Luther, speaking at the Diet of Worms (apocryphal)

With that, the Protestant Reformation was in full swing. 

🎥 Watch: AP European History - Martin Luther and Reformation

Image Courtesy of Wikimedia

John Calvin

Unlike in Catholicism, there isn't a "Protestant Church" structure that unites all Protestants. As a result, modern Protestantism has many different branches as people followed Martin Luther's footsteps and began to interpret the Bible and faith in their own ways. 

One person who followed in Luther’s footsteps was John Calvin (1509—1564), a French theologian. He founded Calvinism, a sect of Protestantism. (Today, Martin Luther's teachings are associated with Lutheranism, another sect of Protestantism.) 

A key tenet of Calvinism, and one of the beliefs that sets it apart from other Protestant sects, is predestination. Calvinists believed that God already knew who was going to heaven and hell. Those that were going to heaven were called the elect. There was nothing anyone could do to change their status, and further you could not know if you were elect or not. 

As you can imagine, this belief caused a great deal of anxiety in Calvinists. People wanted to know if they were truly elect. Over time, they came to view money and wealth as signs of God’s favor, and potentially as signs that they were part of the elect. Centuries later, a German philisopher called Max Weber would call this the roots of the Protestant Work Ethic, a relationship with work that he argued would lead to the rise of capitalism as the economy of the world. 

🎥 Watch: AP European History - Reformation 2.0

Calvin wasn't the only one who came to develop new thoughts about religion. 

Responses to Luther and Calvin

Martin Luther's ideas would spur many others to break away from the Church. Ulrich Zwingli was an influential Swiss reformer who helped spread the Protestant Reformation there. 

Luther and Calvin's work also influenced popular movements. Some were groups like the Anabaptists, whose main belief was that only adults could be officially baptized. This belief, as well as their dislike of authority, made them religious radicals and targets of persecution in their day. Luther also influenced the peasants of the German Peasant's Revolt, a religious crisis we'll talk about more in 2.4 Wars of Religion. 

Protestant Beliefs

As our discussion of predestination suggests, Protestants didn't just break away from the hierarchy of the Catholic Church, although that is a big part of what happened. They came to have some fundamentally different tenets of religious belief. 

We'll be discussing three main beliefs that went on to be core tenets of Protestantism: sola fide, sola scriptura, and the priesthood of all believers.

  1. Sola fide means only faith in Latin. It refers to the belief that faith in Jesus Christ is the sole requirement for salvation. Therefore, good works and other forms of human effort have no bearing on one's salvation. (Once again, no paying for salvation!)
  2. Sola scriptura means only scripture in Latin. It refers to the belief that the Bible is the sole source of authority for Christian faith and practice. This means that Protestants who follow sola scriptura place a strong emphasis on reading and studying the Bible in order to understand God's will and teachings. For example, Protestants generally do not believe in the worship of saints or in the idea of praying to them for intercession, unlike Catholics who do. This is because they do not believe that the Bible teaches this practice, so they don't do it.
  3. Finally, the priesthood of all believers is the idea that all believers have direct access to God through faith in Jesus Christ, and that they do not need to go through a clergyman or any other intermediary in order to have their prayers heard or to receive God's grace. The clergy (people such as Catholic priests, bishops, cardinals, etc.) do not have any special spiritual authority or power. This is in contrast with the beliefs of Catholics, who generally hold that the clergy have a special role in mediation between God and the laity (people who aren't part of the clergy.)

Key Terms to Review (16)

Anabaptists: Anabaptists were a radical Protestant sect that emerged in the early 16th century, advocating for adult baptism and a separation from state influence in religious matters. Their beliefs were rooted in the idea of voluntary faith and the rejection of infant baptism, viewing it as unbiblical. This movement was part of the broader Protestant Reformation, which sought to reform the practices and beliefs of the Catholic Church.
Calvinism: Calvinism is a branch of Protestantism that follows the theological teachings of John Calvin, emphasizing predestination, the sovereignty of God, and the authority of scripture. It significantly influenced the development of various religious and political movements across Europe, shaping societies in both religious and secular contexts.
Diet of Worms: The Diet of Worms was an imperial council held in 1521, convened by Holy Roman Emperor Charles V to address the growing concerns regarding Martin Luther's teachings and the Protestant Reformation. This assembly marked a pivotal moment in religious and political history, as it culminated in Luther's refusal to recant his 95 Theses and other writings, thereby solidifying the divide between the Catholic Church and emerging Protestant beliefs.
German Peasant's Revolt: The German Peasant's Revolt was a widespread uprising in the early 16th century, primarily from 1524 to 1525, where peasants in Germany revolted against oppressive feudal practices and demanded social and economic reforms. This movement is often linked to the broader social changes initiated by the Protestant Reformation, particularly the ideas promoted by Martin Luther that encouraged individuals to question authority, including the social hierarchy.
John Calvin: John Calvin was a French theologian and reformer in the Protestant Reformation known for his influential work in developing the system of Christian theology later called Calvinism. His ideas on predestination, the sovereignty of God, and the importance of a disciplined Christian life greatly shaped the development of Protestant thought and had significant impacts on various aspects of European society and politics.
Martin Luther: Martin Luther was a German theologian and religious reformer whose actions sparked the Protestant Reformation in the 16th century. He challenged the Catholic Church's practices, especially the sale of indulgences, and emphasized salvation through faith alone, reshaping the religious landscape of Europe.
Predestination: Predestination is a theological concept that asserts that God has already determined the fate of individuals, specifically regarding salvation and damnation, before they are born. This idea gained prominence during the Protestant Reformation, especially through the teachings of John Calvin, highlighting the belief in God's sovereignty and grace.
Priesthood of All Believers: The Priesthood of All Believers is a theological concept introduced by Martin Luther, asserting that every Christian has direct access to God and does not require mediation by a priest. This idea was revolutionary during the Protestant Reformation as it challenged the established authority of the Catholic Church and emphasized individual faith and personal relationship with God. It supported the notion that all Christians, regardless of their position or vocation, could serve God and contribute to the church's mission.
Printing Press: The printing press is a mechanical device invented by Johannes Gutenberg in the mid-15th century that revolutionized the production of books and written materials by allowing for mass printing. This innovation played a crucial role in spreading ideas, facilitating literacy, and influencing cultural and religious changes across Europe during the Renaissance and Reformation.
Protestant Work Ethic: The Protestant Work Ethic is a sociological concept that emphasizes hard work, discipline, and frugality as a result of one's faith in Protestantism, particularly Calvinism. It connects the idea that diligence and a strong sense of responsibility in one's work can lead to both material success and spiritual salvation, influencing economic practices and social behaviors during the Reformation and beyond.
Sola Fide: Sola Fide, meaning 'faith alone' in Latin, is a fundamental doctrine of the Protestant Reformation asserting that faith in Jesus Christ is the only means by which individuals can attain salvation. This principle was pivotal in Martin Luther's teachings, emphasizing that good works or adherence to church rituals are insufficient for salvation, thus challenging the established Catholic Church's teachings. Sola Fide represented a shift toward personal faith and the belief that salvation is a gift from God, accessible to all believers.
Sola Scriptura: Sola Scriptura is a Christian doctrine that asserts the Bible is the sole infallible source of authority for faith and practice. This principle emerged prominently during the Protestant Reformation, particularly through the teachings of Martin Luther, who argued that scripture alone was sufficient for understanding God's will, challenging the Catholic Church's reliance on tradition and church authority. By promoting the idea that individuals could interpret the Bible themselves, Sola Scriptura played a crucial role in shaping Protestant thought and facilitating a more personal relationship with faith.
The Elect: The Elect refers to a specific group of people chosen by God for salvation, a concept central to Calvinist theology that emerged during the Protestant Reformation. This belief highlights the notion of predestination, where God has predetermined who will be saved and who will not, which was a departure from the Catholic emphasis on free will and good works. The idea played a crucial role in shaping the religious, social, and political dynamics of Reformed communities during this transformative period.
95 Theses: The 95 Theses were a list of propositions for debate written by Martin Luther in 1517 that criticized the practices of the Catholic Church, particularly the sale of indulgences. This document is often seen as the catalyst for the Protestant Reformation, as it sparked widespread debate and led to significant religious and political changes across Europe.
Ulrich Zwingli: Ulrich Zwingli was a Swiss Protestant reformer who played a crucial role in the early stages of the Reformation, advocating for a break from Catholic traditions and the establishment of a reformed Christian church. He emphasized the importance of Scripture and rejected practices not explicitly supported by the Bible, distinguishing himself from contemporaries like Martin Luther in key theological areas. His reforms significantly impacted religious practices in Zurich and laid groundwork for later Protestant movements.
Wittenberg Church: The Wittenberg Church, also known as the Castle Church, is a significant Protestant landmark located in Wittenberg, Germany. It is famously known for being the site where Martin Luther nailed his Ninety-Five Theses in 1517, marking a pivotal moment in the Protestant Reformation and challenging the Catholic Church's practices, particularly the sale of indulgences.