Influence and ethical merit are not the same thing. A person may profoundly shape history through liberation, scientific discovery, religious teaching, dictatorship, war, institutional reform or mass persecution. This article compares the ethical assessments of twenty-five widely influential figures without treating influence itself as morally positive.
The selection is editorial rather than a definitive ranking of historical importance. It is limited to people for whom Truth By Reason currently has a completed public assessment. Scores are current to 28 June 2026.
How to read this comparison
Each overall result is the equal-weight mean of six applicable dimensions: personal moral conduct, rights and dignity, nonviolence and harm, stewardship of power, wisdom and truthfulness, and consequential legacy.
A high score does not mean the person was flawless. A very negative score does not mean every action or achievement was harmful. The number summarises the supported record and must be read with confidence, period, evidence and limitations.
The calculation is explained in How Truth By Reason Calculates Ethical Scores. The fairness of scoring historical people is examined in Is It Fair to Assign Historical People Ethical Scores?.
Political power, war and government
- Adolf Hitler — -98.78 · A — very high · 1933–1945. The evidence overwhelmingly occupies the destructive poles of every assessed ethical domain. Verified responsibility for genocide activates the lowest possible severe-harm limit. Read the full assessment.
- Joseph Stalin — -93.28 · A — very high · 1924–1953. Large-scale state development and wartime achievement do not outweigh sustained mass repression, avoidable famine and the destruction of elementary rights and baseline ethics. Read the full assessment.
- Mao Zedong — -86.74 · B — high · 1949–1976. State-building and social gains are substantially outweighed by catastrophic mass suffering, coercion and repeated ideological campaigns. The raw score is already below the severe-harm limit. Read the full assessment.
- Vladimir Lenin — -78.14 · B — high · 1917–1924. Revolutionary and egalitarian aims are materially outweighed by deliberate political violence, coercion and destruction of plural political rights. A verified systematic-persecution finding limits the final score. Read the full assessment.
- Benito Mussolini — -91.33 · B — high · 1922–1943. Limited administrative modernisation is recognised. However, Fascist dictatorship, colonial aggression, racial laws, alliance with Nazi Germany and entry into the Second World War dominate the record. Read the full assessment.
- Abraham Lincoln — +63.58 · B — high · 1861–1865. Emancipation and the preservation of constitutional government produce a substantial positive result. That result is reduced by wartime restrictions on liberty, mass suffering and serious injustice toward Indigenous people. Read the full assessment.
- Winston Churchill — +54.48 · C — moderate · 1940–1945. Churchill's wartime resistance to Nazi Germany constitutes a major ethical benefit, but the result is substantially reduced by imperial injustice and serious failures affecting colonial populations. The contested evidence produces a wider range. Read the full assessment.
- Mahatma Gandhi — +72.48 · B — high · 1893–1948. Gandhi's sustained contribution to nonviolent resistance, civil rights and anti-colonial self-government produces a strongly positive result, moderated by serious early prejudice and contested limitations in his approach to caste. Read the full assessment.
- Nelson Mandela — +78.31 · B — high · 1944–2013. Mandela's role in ending apartheid and facilitating democratic, nonracial government produces a strongly positive result. The score is moderated by his responsibility for adopting armed struggle and the risks inherent in sabotage. Read the full assessment.
Rights, rescue and social reform
- Martin Luther King Jr. — +88.34 · B — high · 1955–1968. King's public leadership strongly occupies the positive poles of all assessed domains. The result reflects nonviolent methods, equal-rights aims, personal courage and sustained concern for racism, poverty and war. Read the full assessment.
- Florence Nightingale — +86.72 · B — high · 1854–1910. Nightingale combined care with evidence and institutional reform. Her greatest ethical achievement was converting compassion into systems that continued saving lives after her direct service ended. Read the full assessment.
- Henri Dunant — +95.11 · B — high · 1859–1910. Dunant transformed a direct encounter with battlefield suffering into durable institutions and legal protections. His humanitarian purpose, impartiality and long-term influence make the assessed record exceptionally positive. Read the full assessment.
- Raoul Wallenberg — +99.01 · B — high · 1944–1945. Wallenberg repeatedly used diplomatic access, improvisation and personal courage to obstruct mass murder. The assessed record approaches the highest positive end of the scale. Read the full assessment.
- Rachel Carson — +83.82 · B — high · 1941–1964. Carson's ethical contribution was exceptionally positive: she made complex evidence understandable, exposed preventable harm and did so without fabricating certainty or demanding indiscriminate prohibition. Read the full assessment.
- Jane Goodall — +89.60 · B — high · 1960–2025. Goodall's public ethical impact is exceptionally positive. She combined observation, scientific discovery and moral concern in ways that expanded humanity's understanding of animal minds and created durable conservation institutions. Read the full assessment.
Science, medicine and technology
- Albert Einstein — +64.14 · B — high · 1905–1955. Einstein's record is strongly positive but not unqualified. His science and public defence of human equality carry great weight, while his intervention on nuclear weapons created a foreseeable pathway to grave harm that he later sought to restrain. Read the full assessment.
- Marie Curie — +76.65 · B — high · 1891–1934. Curie's record is strongly positive. Her scientific achievements and practical medical service generated immense and lasting benefit, while safety failures are substantially mitigated by the period's limited knowledge of radiation risk. Read the full assessment.
- Alan Turing — +69.73 · B — high · 1936–1954. Turing's record is strongly positive. His work combined exceptional intellectual benefit with direct service against a genocidal regime. The principal cautions concern collective attribution and the dual-use nature of computing and cryptography. Read the full assessment.
- Jonas Salk — +91.40 · B — high · 1941–1995. Salk’s scientific leadership produced an intervention of extraordinary public benefit and helped establish a durable research institution. Properly recognising collaborators still leaves a strongly positive personal record. Read the full assessment.
Religion and moral philosophy
- Jesus of Nazareth — +69.67 · C — moderate · Public ministry traditionally dated c. 27–30 CE. Jesus scores strongly for compassion, non-retaliation, moral courage and solidarity with outsiders. The score is moderated by severe judgment imagery, exclusivist strands and the difficulty of separating historical teaching from later theological presentation. Read the full assessment.
- Muhammad — -37.05 · C — moderate · Prophetic and political leadership, 610–632. Charitable teachings and contextual reforms deserve recognition, but they do not justify a positive score. Warfare, slavery, sexual access to captives, unequal rights, concentrated authority and severe punishments produce a substantially negative ethical assessment. Uncertainty concerning later reports is reflected in confidence and the plausible range rather than by excluding those reports. Read the full assessment.
- Siddhartha Gautama — the Buddha — +79.61 · C — moderate · Teaching career, approximately fifth century BCE. The Buddha scores very positively for nonviolence, compassion, intellectual self-examination and a practical programme for reducing suffering. The score is moderated by gender hierarchy, ascetic assumptions and the limits of applying an ancient monastic ethic to public institutions. Read the full assessment.
- Guru Nanak — +85.65 · C — moderate · Lifetime and teaching, 1469–1539. Guru Nanak scores very positively for equality, interreligious openness, honest labour, sharing, humility and resistance to caste and gender contempt. Uncertainty about later biographical traditions keeps confidence below the highest level. Read the full assessment.
- Mahavira — +88.73 · C — moderate · Teaching career, approximately sixth–fifth century BCE. Mahavira scores exceptionally well for nonviolence, animal consideration, truth, restraint and opposition to possession and domination. The score is moderated by severe ascetic ideals, uncertain biography and limited guidance for complex collective institutions. Read the full assessment.
- Joseph Smith — -20.82 · B — high · Religious leadership, 1820–1844. Smith's organisational creativity, community solidarity and some pluralist political ideas are substantial positives. They are outweighed by secrecy, unequal plural marriage, coercive authority and suppression of a hostile press, producing a materially negative assessment. Read the full assessment.
Influence can magnify both benefit and harm
Influence increases the possible scale and duration of consequences. A scientific discovery may improve millions of lives. A political doctrine may reshape institutions across continents. A dictator’s control of a modern state may enable persecution and killing on a scale unavailable to an ordinary individual.
Influence is therefore ethically relevant through scope, responsibility and legacy, but it is not itself a virtue. Fame, command and historical significance can magnify destructive conduct just as easily as beneficial conduct.
Why political figures dominate historical memory
Traditional history often gives rulers, generals and revolutionaries more attention than carers, scientists, organisers and victims. Political power produces archives, monuments, borders and wars that are easy to narrate around individual leaders.
This can exaggerate personal credit. National development, military victory and institutional change are produced by large populations. The assessment must ask what the leader personally ordered, enabled, prevented or could reasonably control.
Why rescuers and reformers can score more highly
Several of the strongest positive records concern people who directly reduced severe avoidable suffering, defended equal dignity or created institutions that continued benefiting others after their own involvement ended.
Raoul Wallenberg and Henri Dunant did not command empires. Their ethical importance arises from the seriousness of the harm confronted, the directness of their response and the durability of the protections they helped create.
Science creates benefits and responsibilities
Scientific influence is rarely ethically simple. Discoveries may save lives while also enabling weapons, environmental damage or unequal systems of access.
Marie Curie, Jonas Salk, Alan Turing and Albert Einstein are assessed not merely for intellectual achievement but for foreseeable consequences, public service, attribution and the way knowledge was used.
Religious influence requires evidential caution
Ancient founders and teachers often survive through texts written, transmitted or edited by followers. Historical conduct, attributed teaching and later doctrine may be difficult to separate.
Confidence is therefore generally lower where biography is late or tradition-dependent. Later institutions should not automatically receive the founder’s ethical credit, nor should every later abuse be projected backward onto the founder.
Why large historical achievements do not erase severe harm
Industrialisation, military success, national unity or expanded state capacity can be genuine achievements. They should remain visible even in strongly negative profiles.
But they are not transferable moral credit. Shared achievements must be attributed across workers, institutions and populations, while deliberate persecution, aggressive war and mass killing remain attached to those who ordered or knowingly sustained them.
Differences of a few points should not be exaggerated
A score such as +88.73 is not proof that one person was exactly 3.08 ethical units better than someone at +85.65. The decimals preserve the arithmetic output of the dimension scores; they do not create scientific precision in moral truth.
Broad direction, dimensions, confidence and evidence are more important than small numerical differences. This limitation is discussed further in Can Morality Be Measured?.
The selection will change
This article reflects the assessment database at the date of publication. Many influential people have not yet been assessed. New evidence, corrected attribution and additional profiles may change both the selection and the results.
Absence from this page does not imply lack of influence or ethical significance.
Conclusion
The most influential people in history include rescuers and persecutors, scientists and rulers, reformers and religious teachers. Their influence should not be mistaken for goodness, nor should moral judgment ignore the scale of the consequences they helped create.
The purpose of comparison is not to compress history into a league table. It is to apply common questions about harm, dignity, truth, responsibility, power and legacy while preserving the evidence beneath every result.
For the current extremes across the database, see Highest and Lowest Ethical Scores.