EACH RELIGION · PRO & CON · CITED SOURCES THROUGHOUT · ALPHABETICAL ORDER
Mindfulness-based therapies now mainstream in Western medicine. Buddhist meditation gave rise to Mindfulness-Based Stress Reduction (MBSR) and Mindfulness-Based Cognitive Therapy (MBCT), both of which are now standard clinical tools for treating depression, anxiety, and chronic pain in hospitals worldwide.
Meditation clinically shown to increase compassion and empathy. A systematic review and meta-analysis of randomized controlled trials found a moderate, measurable increase in prosocial behavior — particularly compassion and empathy — following meditation interventions based in Buddhist practice.
Ahimsa (non-violence) principle influenced Gandhi and the global civil rights movement. The Buddhist doctrine of non-violence directly shaped Mahatma Gandhi's philosophy of Satyagraha, which in turn influenced Martin Luther King Jr.'s civil rights strategy, the anti-apartheid movement, and numerous peaceful independence movements in the 20th century.
Buddhist monks preserved literacy and learning during the European Dark Ages. While Europe's academic traditions largely collapsed after the fall of Rome, Buddhist monasteries in Tibet, China, Korea, and Japan served as centers of literacy, manuscript preservation, mathematics, and astronomy for centuries.
Environmental ethics: Buddhist teachings linked to conservation movements. The Buddhist concept of interdependence (pratītyasamutpāda) has given rise to engaged Buddhism and "eco-dharma" environmental activism. The International Network of Engaged Buddhists works with communities across Southeast Asia on forest protection and climate advocacy.
Buddhist monks led or enabled the Rohingya genocide in Myanmar. Human Rights Watch and the International Crisis Group documented that radical Buddhist nationalist monks, most notably Wirathu of the 969 Movement, preached anti-Muslim hate and directly encouraged attacks that displaced over 700,000 Rohingya Muslims — a campaign the UN called a "textbook example of ethnic cleansing."
Buddhist nationalist violence against Tamils in Sri Lanka spanned decades. Sri Lanka's civil war (1983–2009), which killed over 100,000 people, was deeply entangled with Buddhist nationalist ideology. Sinhalese Buddhist monks played an active role in political parties that opposed Tamil rights and in some cases encouraged military violence.
Structural colorism and caste-adjacent hierarchies documented in Buddhist institutions. Academic research has found that Buddhist institutions in South and Southeast Asia carry structural forms of social hierarchy — including colorism, where depictions of the Buddha with lighter skin and adversaries with darker skin are found to correlate with discrimination against darker-skinned communities.
Meditation's prosocial effects weaker than popularly claimed under rigorous testing. A rigorous meta-analysis found that the compassion increases reported in meditation studies largely disappeared when active control groups were used — suggesting that many of the prosocial benefits attributed to Buddhist meditation may reflect demand effects rather than genuine behavior change.
Japanese Buddhist institutions supported imperial militarism and WWII aggression. Major Buddhist sects in Japan — including Zen — formally supported Japanese imperial militarism in the 1930s and 40s, blessing soldiers, encouraging sacrifice, and providing ideological cover for the invasions of China and other Pacific nations. This history is the subject of ongoing scholarly reckoning.
Christian faith-based giving totals $136 billion annually in the U.S. alone. Religion — overwhelmingly Christian-affiliated — is the single largest recipient category of charitable giving in the United States, receiving 23% of all donations. In 2024, Americans gave $592.5 billion total to charity, with religious organizations receiving the largest share.
Christian universities founded modern higher education in the West. The world's oldest continuously operating universities — Bologna (1088), Oxford (c. 1096), Cambridge (1209), Paris (1150) — were founded by or deeply embedded in the Catholic Church. The entire university system of the Western world emerged from Christian monastic and cathedral schools.
Active religious participation is linked to reduced depression and longer lifespan. A Sutherland Institute report synthesizing data from the Brigham Young University study, the National Longitudinal Study of Adolescent Health, and Gallup surveys across 140 countries found that active religious participation is associated with lower depression, lower anxiety, and longer lifespan — with the strongest effects for the most severely depressed individuals.
Christian abolitionists led the campaign to end the transatlantic slave trade. William Wilberforce, the Quakers, and the broader Evangelical abolition movement in Britain were explicitly motivated by Christian theology in their successful campaign to outlaw the slave trade in 1807. Similarly, the U.S. abolitionist movement was largely rooted in Protestant theology.
Gallup: 160 million additional adults have positive life experiences due to religiosity. A Faith and Wellness report based on Gallup data from 2012–2022 across tens of thousands of respondents in 140 countries estimated that 160 million more adults report positive life experiences than would be the case if they were not religious.
The Crusades killed hundreds of thousands over two centuries. The nine major Crusades (1095–1291) initiated by the Catholic Church resulted in the deaths of hundreds of thousands of Muslims, Jews, Eastern Christians, and Crusaders. The First Crusade alone included massacres of Jewish communities in the Rhineland before fighters even reached the Holy Land, with over 1,000 Jews killed at Mainz alone.
The Spanish Inquisition tortured and executed thousands for religious non-conformity. Established in 1478 by the Spanish Crown with papal approval, the Spanish Inquisition prosecuted tens of thousands for heresy, apostasy, and practicing Judaism or Islam in secret. A 2004 Vatican-commissioned report confirmed thousands of executions, though revisionists debate the total scale.
Catholic Church's systemic child sexual abuse covered up across decades worldwide. Grand jury reports, royal commissions, and the 2018 Pennsylvania grand jury report (which documented 1,000+ child victims and 300+ predator priests in one state alone) confirmed systemic sexual abuse of children by clergy and systematic institutional cover-up across dozens of countries.
Christian missions involved forced conversions and cultural destruction of indigenous peoples. Across the Americas, Africa, Asia, and the Pacific, Christian missionary activity was deeply intertwined with colonial conquest, including the destruction of indigenous languages, religions, and cultures — and in many cases the justification of enslavement and land seizure.
Witch trials killed an estimated 40,000–60,000 people across Europe. Between roughly 1450 and 1750, an estimated 40,000–60,000 people — predominantly women — were executed following witch trial convictions across Europe. The trials were explicitly religious in character, justified by church doctrine and often prosecuted by church-affiliated courts.
Yoga is practiced by 300 million people globally and 55 million in the U.S. Rooted in Hindu philosophy, yoga is now practiced by an estimated 300 million people worldwide. U.S. practitioners number over 55 million. Clinically validated benefits include reductions in anxiety, blood pressure, chronic pain, and depression.
Ancient India originated the numeral zero and the decimal system. Hindu mathematicians including Brahmagupta (7th century CE) formalized the concept of zero as a number — an innovation that enabled algebra, calculus, computing, and modern science. The decimal number system now used universally originated in ancient India.
Ayurveda — a 5,000-year-old medical system — is now studied in Western clinical settings. Ayurvedic medicine, which originated in ancient Hindu texts, has been the subject of modern clinical research for treatments of metabolic syndrome, diabetes management, and inflammatory conditions. It influenced traditional medicine systems across Southeast Asia and the Arab world.
Hinduism's philosophical pluralism influenced Western liberal thought. Hindu philosophical traditions — particularly Advaita Vedanta, with its emphasis on the unity of all existence — significantly influenced Ralph Waldo Emerson, Henry David Thoreau, and the Transcendentalist movement, which in turn shaped American individualism and environmental ethics.
Ahimsa principle gave the world its most effective nonviolent political philosophy. The Hindu principle of ahimsa (non-harm) is the direct philosophical ancestor of Gandhi's Satyagraha — "truth-force" — the nonviolent resistance methodology that defeated British colonialism and inspired every major nonviolent movement of the 20th century.
The caste system — rooted in Hindu texts — has oppressed 200+ million people for millennia. The Hindu varna system and its elaborated caste hierarchy condemned hundreds of millions of Dalits ("untouchables") to hereditary poverty, social exclusion, and dehumanization for over 3,000 years. Although legally abolished in India in 1950, caste discrimination remains widespread and is documented in academic research, UN reports, and Human Rights Watch investigations.
Sati — widow self-immolation — was practiced for centuries under religious sanction. The practice of sati (or suttee), in which a Hindu widow would self-immolate on her husband's funeral pyre — sometimes coerced — was practiced in parts of India for centuries and was justified by some Hindu texts and priests. It was officially banned by British colonial law in 1829, though isolated incidents were reported as recently as 1987.
Hindu nationalist violence (Hindutva) has produced mass communal riots since 1947. Hindu nationalist ideology (Hindutva) has driven repeated episodes of communal violence against Muslims and Christians in India, most notably the 2002 Gujarat riots in which over 1,000 Muslims were killed. Academic research documents ties between Hindutva movements and state-level political parties.
Gender discrimination institutionalized: women barred from temples, education, and inheritance historically. Traditional Hindu texts and practices have historically restricted women's access to temples, education, public life, and property inheritance. The Manusmriti (Laws of Manu), a Hindu legal text, codified subordinate status for women and lower castes in ways that shaped Indian law for centuries.
Islamic scholars invented algebra and preserved ancient Greek knowledge during Europe's Dark Ages. Al-Khwarizmi's 9th-century text "Al-Kitab al-mukhtasar fi hisab al-jabr wal-muqabala" gave the world algebra. The word "algorithm" derives from his name. The House of Wisdom in Baghdad translated and expanded upon Greek, Indian, and Persian science when European scholarship had largely collapsed.
Islam established the world's first hospitals — funded by the zakat charity tax. The first dedicated hospitals in history were established in the Islamic world by the 8th century CE, funded by the mandatory zakat charitable tax. These hospitals treated patients regardless of religion, provided free medicine, and separated patients by condition — centuries before European hospitals existed.
Avicenna's Canon of Medicine was the standard European medical textbook for 600 years. Ibn Sina (Avicenna), an 11th-century Muslim physician, wrote the Canon of Medicine — a comprehensive medical encyclopedia that was the primary medical textbook in both the Islamic world and European universities from the 12th through the 17th centuries.
Zakat — mandatory 2.5% wealth tax — is one of history's largest structured poverty-relief systems. Zakat, one of the Five Pillars of Islam, requires Muslims to donate 2.5% of their accumulated wealth annually to the poor. Estimates of annual global zakat payments range from $200 billion to $1 trillion, making it one of the world's largest poverty-relief mechanisms.
Scholars of multiple religions worked side-by-side in Islamic institutions during the Golden Age. The House of Wisdom and the great Islamic universities of Cordoba, Baghdad, and Cairo brought together Muslim, Christian, Jewish, Zoroastrian, and Hindu scholars working collaboratively — a model of multireligious intellectual cooperation unparalleled in the medieval world.
Islamist terrorist organizations responsible for tens of thousands of deaths globally since 2000. The Global Terrorism Index documents that Islamist extremist groups — including ISIS, Al-Qaeda, Boko Haram, and Al-Shabaab — have been responsible for the majority of terrorist fatalities globally since the early 2000s. The September 11, 2001 attacks alone killed nearly 3,000 people.
Peer-reviewed study: Islamist terrorism causally lowers women's legal status across 171 countries. A peer-reviewed study in the Journal of Public Choice analyzed data from 171 countries between 1970 and 2016 and found that Islamist terrorist activity — distinct from Islam as a religion — causally reduces women's legal status, using neighboring-country terrorism as an instrumental variable.
Apostasy laws in multiple Muslim-majority countries carry the death penalty. As of 2024, apostasy (leaving Islam) is punishable by death in at least 12 countries with Muslim-majority populations, including Saudi Arabia, Iran, Pakistan, and Afghanistan. Pew Research Center has documented widespread popular support for apostasy laws in many Muslim-majority countries.
Women's rights lag significantly in Muslim-majority countries across multiple measures. A Tandfonline peer-reviewed study documents that women's participation in the workforce, national parliaments, and schooling lags significantly behind in Muslim-majority countries across geographic regions as different as Egypt and Indonesia — reflecting the influence of conservative religious interpretations on law and custom.
Islamic slave trade operated for over 1,000 years across Africa, Europe, and Asia. The Arab slave trade — which predated and outlasted the transatlantic slave trade — involved the trafficking of an estimated 10–18 million African slaves over more than a millennium. Academic historians note this history receives far less mainstream attention than the better-documented European/Atlantic slave trade.
Jews have won 22% of all Nobel Prizes despite being 0.2% of the world's population. Despite representing just 0.2% of the global population, Jewish individuals have won approximately 22% of all Nobel Prizes awarded since 1901 — including 41% of all economics prizes — representing a disproportionate intellectual contribution to human knowledge across medicine, physics, chemistry, literature, and peace.
Jewish ethical tradition gave the world the concept of universal human dignity. The Hebrew Bible's concept of all humans being created "in the image of God" (b'tzelem Elohim) is the philosophical foundation for universal human rights. This principle was foundational to the drafting of the Universal Declaration of Human Rights (1948), influenced by Jewish legal scholar René Cassin.
Tikkun Olam ("repair the world") motivates outsized Jewish participation in social justice causes. The Jewish concept of Tikkun Olam is documented by sociologists as a major driver of Jewish-American engagement in civil rights, labor rights, environmental justice, and refugee aid — disproportionate to the community's size.
Sabbath (Shabbat) — a weekly mandatory rest — is the world's oldest institutionalized labor protection. The Mosaic law mandating a complete day of rest each week — applying to servants and animals as well as free people — is often cited by labor historians as a foundational precursor to modern weekends, the 8-hour workday movement, and labor rights.
Ultra-Orthodox communities in Israel have blocked LGBTQ+ rights and civil marriage. Ultra-Orthodox (Haredi) Jewish political parties in Israel wield outsized political influence, blocking civil marriage, opposing LGBTQ+ legal recognition, and restricting women's access to the Western Wall. Academic studies document their role in maintaining religious legal control over civil matters affecting all Israelis.
Jewish law (halacha) gives husbands unilateral power to deny religious divorce (get), trapping women. Under Orthodox Jewish law, only a husband can grant a religious divorce (get). Women who are refused a get — "agunot" (chained women) — are trapped in marriages even after civil divorce, unable to remarry within the faith. Rabbinical courts have been criticized for failing to compel recalcitrant husbands.
Occupation policies justified by some as religious mandate have drawn UN censure 45+ times. Some Israeli settlement movement leaders justify the occupation of the West Bank explicitly on religious grounds (the biblical concept of Eretz Yisrael). The UN Security Council passed Resolution 2334 (2016) declaring settlements a violation of international law, and the International Court of Justice issued an advisory opinion in 2024 finding the occupation unlawful.
Biblical texts used historically to justify slavery, anti-Semitism, and colonialism — including by Jews against others. Certain passages in the Hebrew Bible (including the "Curse of Ham" in Genesis 9) were used by Christian and some Jewish theologians to justify racial slavery. These texts have also been weaponized by other groups against Jews themselves, creating a complex legacy of textual abuse.
Langar: Sikh community kitchens feed 100,000+ people free every day at the Golden Temple alone. Every Sikh gurdwara (temple) maintains a langar — a community kitchen serving free food to anyone regardless of religion, caste, or income. The Golden Temple in Amritsar serves over 100,000 free meals daily and feeds up to 150,000 during festivals, making it one of the world's largest free dining operations.
Sikhism explicitly rejected the caste system 500 years before modern civil rights movements. Guru Nanak, founder of Sikhism, explicitly rejected the Hindu caste system, declared all humans equal before God, and institutionalized this equality through the langar — which required people of all castes to sit and eat together at a time when doing so was taboo. This was a radical act of social equality in 15th-century India.
Sikh volunteers among the world's most active disaster relief workers (Khalsa Aid). Khalsa Aid, a Sikh humanitarian NGO, has deployed volunteers to crisis zones including Syria, Iraq, Yemen, Kashmir floods, COVID-19 relief, and Ukraine — motivated explicitly by the Sikh doctrine of Sarbat da Bhala ("welfare of all"). The organization has been nominated for the Nobel Peace Prize.
Gender equality enshrined in founding texts: women and men equal before God. Sikh scripture explicitly states that women and men are equal before God. Historically, Sikh women participated in battle, governance, and religious leadership — at a time when most world religions formally excluded women from public religious authority.
Khalistan separatist movement linked to terrorism including the 1985 Air India bombing (329 killed). The Khalistan movement — which seeks an independent Sikh homeland carved from the Punjab — has been linked to serious acts of terrorism, most notably the 1985 bombing of Air India Flight 182, killing all 329 people aboard. It remains the deadliest aviation terrorist attack in Canadian history.
Caste discrimination persists in practice within Sikh communities despite theological rejection. Despite Sikhism's foundational rejection of caste, academic studies and human rights organizations document that jat (caste-based) discrimination persists in Sikh communities in India, the UK, and the diaspora — including in gurdwara membership, marriage practices, and social hierarchies.
Sikh institutions have been slow to address sexual abuse by religious figures. A series of investigative reports in the UK and North America documented cases of sexual abuse by Sikh religious figures (granthis and sants), with institutional responses criticized for prioritizing community reputation over victim support — a pattern parallel to those documented in other faith communities.
Taoist medicine gave the world acupuncture, now practiced in 183 countries. Traditional Chinese medicine — deeply rooted in Taoist philosophy — includes acupuncture, herbal medicine, and qigong. The World Health Organization recognizes acupuncture for treating over 30 conditions. It is practiced in 183 countries and has been the subject of hundreds of clinical trials.
Taoist philosophy of wu wei (effortless action) influenced systems thinking, ecology, and management theory. The Taoist principle of wu wei — working with natural systems rather than against them — has influenced ecological philosophy, permaculture, and modern organizational theory. Thinkers from Alan Watts to modern systems biologists have drawn on Taoist ideas.
Tao Te Ching is the second most translated book in human history after the Bible. Laozi's Tao Te Ching has been translated into over 250 languages, making it the world's second most translated text. Its philosophy of simplicity, harmony, and non-aggression has influenced thinkers, artists, and leaders across 25 centuries on every continent.
Taoism's emphasis on nature as sacred is documented as a precursor to environmental ethics. Taoist concepts of humanity as part of — not separate from or superior to — the natural world have been identified by environmental philosophers as precursors to deep ecology, biocentrism, and sustainable land ethics.
Taoist alchemical traditions killed practitioners seeking immortality elixirs containing arsenic and mercury. Taoist alchemical practice (waidan), which sought physical immortality through elixirs, involved compounds of arsenic, mercury, and lead. Multiple Chinese emperors and scholars are documented to have died of heavy metal poisoning from seeking Taoist elixirs of immortality.
Taoist institutions in China have historically been manipulated by authoritarian regimes. Taoist institutions in mainland China operate under strict government oversight and have been used by the Chinese Communist Party to project "soft power" abroad while suppressing independent Taoist practice. The Chinese Taoist Association is government-controlled, limiting genuine religious autonomy.
Taoist practice has been used to justify gender hierarchies and female subservience in some traditions. Some Taoist texts and lineages have historically associated the feminine with passivity, weakness, and subservience — despite the Tao itself being associated with feminine qualities. Academic studies have documented how these texts were used to justify patriarchal social structures in Chinese history.
Jainism is the world's most radically non-violent religion — ahimsa in absolute practice. Jainism's core principle of ahimsa (non-violence toward all living beings) is more absolute than any other religious tradition's — many Jain monks wear cloth masks to avoid inhaling insects and sweep the ground before walking. This influence on Indian philosophy helped shape Gandhi's non-violence doctrine.
Jains are statistically the most educated and highest-earning religious group in India. Despite comprising less than 0.5% of India's population, Jains are the most literate religious community in the country (94.1% literacy vs. 73% national average) and control an estimated 24% of India's tax revenue through their disproportionate presence in business, finance, and trade.
Jain concept of Anekantavada (many-sidedness of truth) is philosophically unique. The Jain doctrine that all complex truths have many sides and no single perspective is complete (Anekantavada) is considered one of the most sophisticated contributions to epistemology and logic in world philosophy — influencing relativism, pluralism, and conflict-resolution theory.
Jain-run animal shelters (Panjrapoles) are among the world's oldest animal welfare institutions. Panjrapoles — animal shelters run by Jain communities — have operated continuously in India for over 500 years, providing refuge for injured, old, and disabled animals. They are considered among the world's oldest institutionalized animal welfare organizations.
Extreme ascetic practices include self-starvation (Santhara) and deliberate exposure to the elements. The Digambara Jain practice of Santhara (or Sallekhana) — fasting to death as a religious act — has been the subject of legal challenges in India. A Rajasthan High Court briefly declared it illegal in 2015 before the ruling was stayed. Critics argue it can be coerced on elderly or ill community members.
Strict dietary requirements can limit Jains' ability to consume nutritionally complete diets. Jain dietary rules prohibit root vegetables (potatoes, carrots, onions, garlic) to avoid killing the whole plant. Strict practitioners face documented nutritional challenges, particularly regarding vitamin and mineral deficiency, especially in children and pregnant women.
Jain community wealth concentration has been linked to exclusionary lending practices. Jain-dominated banking and finance communities in Gujarat and Rajasthan have historically extended preferential credit within the community, contributing to exclusionary financial practices that disadvantaged lower-caste and non-Jain borrowers seeking capital for small businesses.
Shinto's reverence for nature underpins Japan's extraordinary forest conservation record. Japan has one of the highest forest-cover percentages (68%) of any developed nation, partly attributed to the Shinto concept of satoyama — sacred relationships between human communities and surrounding forests. Shrine forests (chinju no mori) have served as biodiversity refuges for over 1,000 years.
Shinto festivals (matsuri) are documented to strengthen community social cohesion. Academic research in Japanese social psychology documents that participation in Shinto matsuri (festivals) measurably increases community social cohesion, sense of belonging, and inter-generational ties — producing documented mental health benefits especially among elderly populations.
Shinto philosophy of impermanence and cyclical renewal influenced Japanese architecture and design. The Shinto practice of dismantling and rebuilding the Ise Shrine every 20 years — a tradition over 1,300 years old — reflects a philosophy of impermanence that profoundly influenced Japanese aesthetics, including wabi-sabi and the design principles that underlie modern Japanese minimalism.
State Shinto was the ideological backbone of Japanese imperial militarism and WWII atrocities. State Shinto — a government-mandated version of Shinto that deified the Emperor — was the primary ideological engine of Japanese imperial militarism from the Meiji Restoration (1868) through WWII. It provided religious justification for conquest, the Nanjing Massacre (est. 200,000–300,000 killed), and the brutal treatment of prisoners of war.
Yasukuni Shrine honors 14 Class A war criminals, causing ongoing diplomatic crises. The Yasukuni Shrine in Tokyo enshrines the spirits of Japanese war dead — including 14 Class A war criminals convicted at the Tokyo Trials. Political leaders' visits to the shrine have triggered repeated diplomatic crises with China and South Korea, with scholarly debate over whether the shrine represents ongoing Shinto complicity in historical revisionism.
Shinto ritual purity concepts have historically reinforced discrimination against menstruating women and the disabled. Traditional Shinto concepts of ritual purity (kegare) historically categorized menstruation, death, and disability as sources of pollution requiring purification — with documented effects on women's access to sacred spaces and the social marginalization of people with disabilities in traditional Shinto communities.
Baháʼí Faith was the first major world religion to enshrine gender equality as a core doctrine. Founded in 1844, the Baháʼí Faith was among the first religious movements to explicitly declare the equality of women and men as a core theological principle — predating women's suffrage movements in most countries by decades. The religion forbids gender discrimination within its institutions.
Baháʼís developed rural community education in 185+ countries through grassroots programs. The Ruhi Institute curriculum, developed by Baháʼí communities and used in over 185 countries, has provided community-level moral education, literacy, and children's classes in some of the world's most underserved rural communities — reaching millions with no government support.
Baháʼí principle of unity of religions reduces sectarian conflict in interfaith contexts. The Baháʼí doctrine that all major world religions reflect successive revelations of one God has been cited by interfaith scholars as a structurally conflict-reducing worldview. Baháʼí communities are documented to function as neutral mediators in religiously divided communities.
Baháʼís face systematic state persecution in Iran — over 200 executed since 1979. The Islamic Republic of Iran considers the Baháʼí Faith heretical. Since 1979, over 200 Baháʼís have been executed, thousands imprisoned, and the community has been denied access to universities and government employment. The UN has repeatedly condemned Iran's treatment of Baháʼís as a violation of international law.
LGBTQ+ relationships not recognized and homosexuality discouraged in Baháʼí doctrine. Despite its progressive stance on gender equality and racial unity, Baháʼí doctrine does not recognize same-sex relationships and discourages homosexual conduct. This stance has been criticized by LGBTQ+ advocates, though the religion does not sanction violence or legal punishment.
Baháʼí administrative order criticized for lack of accountability and dissent suppression. Former members and scholars have criticized the Baháʼí administrative order for shunning (removing fellowship from) members who publicly question doctrine, removing academics who publish critical scholarship, and lacking mechanisms for internal dissent — practices that critics compare to authoritarian religious governance.