This comparison examines six influential religious founders and teachers: Mahavira, Guru Nanak, Siddhartha Gautama, Jesus of Nazareth, Joseph Smith and Muhammad. It assesses attributed conduct and teaching within defined periods; it does not rank the truth of their religions or the moral worth of present-day followers.
Current comparative scores
- 1. Mahavira — +88.73 · C — moderate · Teaching career, approximately sixth–fifth century BCE · full assessment
- 2. Guru Nanak — +85.65 · C — moderate · Lifetime and teaching, 1469–1539 · full assessment
- 3. Siddhartha Gautama — the Buddha — +79.61 · C — moderate · Teaching career, approximately fifth century BCE · full assessment
- 4. Jesus of Nazareth — +69.67 · C — moderate · Public ministry traditionally dated c. 27–30 CE · full assessment
- 5. Joseph Smith — -20.82 · B — high · Religious leadership, 1820–1844 · full assessment
- 6. Muhammad — -37.05 · C — moderate · Prophetic and political leadership, 610–632 · full assessment
Why these assessments are unusually difficult
The surviving evidence is not equally strong. Jesus, the Buddha and Mahavira are known mainly through texts preserved and shaped by later communities. Guru Nanak’s teachings are better connected to early Sikh tradition but later biography still contains legendary material.
Muhammad combined religious teaching with military, legal and political leadership. Joseph Smith lived in a documentary modern period but remains surrounded by sharply conflicting devotional and critical accounts.
These differences affect confidence and comparability.
Individual assessments
Mahavira
Overall score: +88.73 · Confidence: C — moderate · Period: Teaching career, approximately sixth–fifth century BCE
Principal positive evidence: Radical nonviolence, protection of humans and animals, truthfulness, non-stealing, non-possession, compassion, restraint and many-sided reasoning strongly oppose harm, domination and dogmatic certainty.
Principal negative evidence or limitations: Potential harms arise from extreme ascetic disciplines that can burden bodily welfare and autonomy, continuing monastic hierarchy, uncertain late sectarian biography and limited guidance for complex collective institutions.
Read the full detailed assessment
Guru Nanak
Overall score: +85.65 · Confidence: C — moderate · Period: Lifetime and teaching, 1469–1539
Principal positive evidence: Guru Nanak's strongest evidence is his rejection of caste superiority, affirmation of women's dignity and human equality, honest labour, sharing, service, humility, hospitality and criticism of exploitation and oppressive power.
Principal negative evidence or limitations: No substantial pattern of harmful teaching is established. The principal limitations are evidentiary: later biographical traditions vary in reliability, religious authority remains present, and no detailed modern institutional programme is developed.
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Siddhartha Gautama — the Buddha
Overall score: +79.61 · Confidence: C — moderate · Period: Teaching career, approximately fifth century BCE
Principal positive evidence: Non-killing, compassion, loving-kindness, restraint, truthfulness, self-examination, non-attachment and concern for all sentient beings form a coherent programme for reducing suffering.
Principal negative evidence or limitations: The principal limitations are subordinate institutional rules for women, hierarchical monastic authority, severe ascetic assumptions, uncertain biography and limited direct treatment of structural injustice or public institutions.
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Jesus of Nazareth
Overall score: +69.67 · Confidence: C — moderate · Period: Public ministry traditionally dated c. 27–30 CE
Principal positive evidence: Enemy-love, non-retaliation, forgiveness, care for poor, sick and excluded people, criticism of hypocrisy, service rather than domination and moral concern for enemies form the strongest positive evidence.
Principal negative evidence or limitations: The record also contains severe apocalyptic judgment, exclusivist and family-renunciation sayings, no systematic challenge to slavery or patriarchy, and no developed institutional safeguards against religious authority.
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Joseph Smith
Overall score: -20.82 · Confidence: B — high · Period: Religious leadership, 1820–1844
Principal positive evidence: Smith created a durable religious community, inspired mutual aid and sacrifice, developed an expansive theology, promoted religious liberty and produced significant organisational and institutional innovation.
Principal negative evidence or limitations: The strongest negative evidence concerns secret and unequal plural marriage, including a fourteen-year-old, concealment, suppression of a critical press, financial controversy, militia escalation and concentration of religious, civic and political power.
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Muhammad
Overall score: -37.05 · Confidence: C — moderate · Period: Prophetic and political leadership, 610–632
Principal positive evidence: Muhammad promoted almsgiving, care for orphans, community support, negotiated settlements and some limits on vengeance.
Principal negative evidence or limitations: These benefits are outweighed by warfare, enslavement, concubinage, unequal rights, concentrated religious-political power and severe capital and corporal punishments attributed in early and canonical traditional sources.
Read the full detailed assessment
This is not a ranking of religions
A founder’s assessed score does not determine whether a religion is true, whether every later doctrine follows from the founder or whether present followers behave ethically.
Religious institutions can preserve, modify, ignore or contradict founding teachings. Later conduct should be assessed separately rather than transferred backward onto the founder.
Historical person, attributed teacher and scriptural figure
These categories must not be confused.
- A historical person is assessed through recoverable conduct and context.
- An attributed teacher is assessed through teachings reasonably connected to that person, with uncertainty stated.
- A scriptural portrayal is assessed as the character presented by a text, not as a verified historical biography.
The wider Ethical Assessments of Religious and Scriptural Figures includes both founders and scriptural portrayals, which is why its membership is broader than this article.
Teaching and institutional power
A teacher who held little coercive power presents a different ethical problem from a founder who governed, commanded armies, imposed law or controlled a tightly organised community.
Stewardship of power should be evaluated according to the authority actually possessed. Lack of political power is not automatically virtue, but greater power creates greater responsibility for coercion, rights and preventable harm.
Ancient silence is not necessarily approval
Ancient teachers did not address every issue now considered ethically important. Silence about slavery, patriarchy, democratic safeguards or modern institutions may reflect historical context rather than explicit endorsement.
However, an assessment should not invent a modern position the person never expressed. Silence may therefore appear as a limitation without being treated as equivalent to active abuse.
Asceticism and bodily welfare
Several traditions praise renunciation, celibacy, fasting or severe discipline. These practices may support restraint and reduced consumption, but they can also burden bodily welfare, autonomy or social participation.
The ethical judgment depends upon voluntariness, severity, effects on dependants and whether the practice is imposed through authority.
Equality and exclusion
Religious founders often challenged some inherited hierarchies while retaining others. Teachings may promote charity, compassion or spiritual equality yet coexist with gender hierarchy, slavery, caste, exclusivism or severe punishment.
A balanced assessment must preserve both parts of the record rather than selecting only inspirational sayings or only hostile passages.
Later biography and miracle traditions
Miracle claims, prophetic authority and supernatural status are not treated as established merely because a sacred text reports them. The ethical assessment focuses on conduct and attributed teaching that can be examined without requiring acceptance of the religion’s metaphysical claims.
Legendary material may still reveal how a community understood its founder, but it receives less historical confidence.
Why confidence differs
Moderate confidence does not mean the assessment is arbitrary. It means important questions remain about textual dating, attribution, biography or interpretation.
High confidence can be possible for a modern founder where documentary evidence is extensive, even where followers and critics strongly dispute the moral meaning of that evidence.
Consistent standards across religions
The same questions should be asked of every founder:
- Did the teaching reduce or justify harm?
- Did it support equal dignity or inherited hierarchy?
- How was authority exercised?
- Were outsiders and dissenters treated fairly?
- Were claims presented truthfully?
- What foreseeable consequences followed?
- How reliable is the attribution?
A standard used to criticise one religion should not disappear when assessing another.
Conclusion
The comparison identifies substantial ethical differences without pretending that ancient and modern founders are evidentially identical. It also shows why a score must remain attached to confidence, scope and sources.
For the broader fairness problem, read Is It Fair to Assign Historical People Ethical Scores?. For the calculation itself, read How Truth By Reason Calculates Ethical Scores.