12 times religion did more harm than good

Religion continues to shape how people see the world, with global data from the Pew Research Center showing that more than 80% of the population identifies with a religious group.

That influence can be powerful in positive ways. Religious identity often strengthens community ties, shared values, and a sense of belonging. But it can also create tension, especially when it intersects with politics, power, or social divisions.

Understanding that balance is key. Religion can unite, but in certain contexts, it can also divide, depending on how it is expressed and experienced.

What History Says

Interest in understanding this duality has grown among sociologists and historians, especially as global communication exposes both the positive and negative impacts of institutional religion.

Desire for clarity drives ongoing academic debate about how belief systems influence human behavior under political, cultural, or economic pressure. Here are 12 times religion did more harm than good.

The Crusades (11th–13th centuries)

The Crusades represent a series of religiously framed military campaigns that led to prolonged conflict between Christian and Muslim populations in the Middle East and Europe.

Historical estimates from academic sources, such as the Encyclopedia Britannica, indicate significant civilian and military casualties over multiple centuries. Scholars note that while motivations included politics and territorial control, religious justification intensified participation and prolonged the conflict.

Modern historians emphasize that the Crusades also reshaped trade routes and cultural exchange, but the violence and long-term mistrust remain central to their historical legacy.

The Spanish Inquisition

The Spanish Inquisition was established to enforce religious orthodoxy within Catholic territories in Spain. Historical records show thousands were investigated and punished over several centuries.

Academic research highlights that methods of interrogation and enforcement created widespread fear and social exclusion. While some historians argue it also served political consolidation purposes, its association with religious authority significantly shaped public perception of institutional control.

The Inquisition remains one of the most studied examples of religious enforcement intersecting with state power.

The Salem Witch Trials

The Salem Witch Trials of 1692–1693 led to the execution and imprisonment of accused individuals based on alleged witchcraft. Scholars from institutions such as Harvard describe the event as a combination of religious fear, social tension, and legal failure.

Religious interpretation of unexplained behavior played a central role in accusations. Modern analysis frames the trials as an example of mass hysteria amplified by rigid belief systems and weak judicial safeguards.

The Thirty Years’ War

This European conflict (1618–1648) involved major Catholic and Protestant powers and resulted in widespread devastation across Central Europe. Academic estimates suggest millions of deaths due to warfare, famine, and disease.

While political power struggles were central, religious division intensified and prolonged the conflict. Historians often describe it as one of the most destructive religiously entangled wars in European history.

You might also want to read:

• Religion across America by state: where faith is strongest and where it’s declining
• 12 reasons why religion is making a comeback in some regions
• 10 reasons millions reject traditional religion for New Age beliefs

Anti-Jewish pogroms in medieval and early modern Europe

Across centuries, Jewish communities in Europe faced repeated waves of persecution, often justified through religious narratives. Historical scholarship documents expulsions, violence, and forced conversions in multiple regions.

Researchers emphasize that economic and political factors also played roles, but religious prejudice was frequently used as justification for discrimination and exclusion.

The Partition of India (1947)

The Partition of British India into India and Pakistan led to one of the largest mass migrations in history, with estimates of up to 14 million displaced and a significant loss of life.

Academic studies highlight that religious identity (Hindu and Muslim divisions) was a major factor in political separation. Scholars emphasize that colonial governance, political negotiation failures, and communal tensions all contributed to the violence.

The Northern Ireland Conflict (“The Troubles”)

This conflict involved political and sectarian divisions between Protestant and Catholic communities in Northern Ireland. Research from institutions such as the University of Oxford shows that, while the conflict was political in nature, religious identity often overlapped with national and cultural affiliations.

The violence led to decades of instability and significant loss of life before the Good Friday Agreement.

Witch hunts in early modern Europe

Between the 15th and 18th centuries, tens of thousands were accused and executed for witchcraft across Europe. Historians link these events to religious belief systems combined with social anxiety, economic instability, and gendered power structures.

The belief in the spiritual causation of misfortune contributed to legal and social persecution.

Rwandan genocide (religious involvement context)

The 1994 genocide was primarily ethnic in nature, but religious institutions were present in communities affected by the violence. Some reports documented both protection and failure by religious leaders.

Scholars emphasize that religion itself was not the cause, but institutional responses during crises remain subjects of ethical and historical analysis.

Forced conversions in the colonial context

During European colonization, missionary activity sometimes intersected with colonial authority, leading to forced or pressured conversions of Indigenous populations.

Academic research highlights that religious missions were often tied to political expansion, resulting in cultural displacement and loss of indigenous spiritual systems.

Sectarian violence in Iraq (post-2003 era)

Following the 2003 Iraq War, sectarian divisions between Sunni and Shia groups intensified, contributing to widespread violence.

Analysts note that while political instability was central, religious identity became a major marker in conflict alignment, exacerbating tensions in certain regions.

Child abuse scandals in religious institutions (modern cases)

Reports across multiple countries have documented widespread abuse cases within segments of religious institutions, particularly within the Catholic Church. Investigations in the United States, Ireland, and Australia revealed systemic failures in accountability.

Scholars emphasize that these cases involve institutional misconduct rather than theology itself, but they significantly impacted public trust in religious organizations.

Key takeaways

• Pew Research data shows religion remains globally dominant, but institutional trust varies widely.
• Many historical conflicts involved overlapping political, economic, and religious factors.
• Religion often served as a reinforcing layer of identity rather than the sole cause of events.
• Modern scholarship emphasizes separating belief systems from institutional or political misuse.
• Understanding these cases requires context, not blanket conclusions.

Disclosure: This article was developed with the assistance of AI and was subsequently reviewed, revised, and approved by our editorial team.

Like our content? Follow us on Newsbreak. 

13 common fears that make it hard for people to let go of religion

Letting go of religion isn’t just a spiritual decision; it’s a profoundly emotional, social, and psychological one. 

Many people cling to faith not only because of belief but because religion provides comfort, identity, and structure. Leaving can feel like stepping off a cliff, even when personal conviction has shifted. Learn more.