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What Is Humanism?

Humanism is a philosophical and ethical stance that emphasizes the value, agency, and rational capacity of human beings — centering morality, meaning, and purpose on human experience and reason rather than on supernatural authority or divine revelation. In its modern secular form, humanism holds that humans can lead ethical, meaningful lives without religion, using evidence, empathy, and critical thinking as their guides.

The Word Means Different Things in Different Eras

Here’s what trips people up: “humanism” doesn’t refer to one single philosophy. The word has been used across centuries to describe related but distinct movements. Getting these straight matters.

Renaissance humanism (14th-16th centuries) was primarily an educational and cultural movement. It didn’t reject religion — most Renaissance humanists were practicing Christians. Instead, it emphasized studying classical Greek and Latin texts, developing human potential through education, and valuing individual achievement in art, literature, and scholarship. Petrarch, Erasmus, and Thomas More were Renaissance humanists.

Enlightenment humanism (17th-18th centuries) shifted emphasis toward reason, science, and individual rights. Thinkers like Voltaire, John Locke, and Immanuel Kant argued that human reason — not tradition, authority, or revelation — should guide knowledge and ethics. This movement was more skeptical of religious authority, though not uniformly atheistic.

Secular humanism (20th century-present) is the form most people mean when they say “humanism” today. It explicitly grounds ethics in human reason and well-being, considers science the best method for understanding reality, and maintains that supernatural explanations are unnecessary. The Humanist Manifesto I (1933), Humanist Manifesto II (1973), and Humanist Manifesto III (2003) articulate evolving versions of these principles.

Religious humanism refers to humanistic approaches within religious traditions — Unitarian Universalism, ethical culture societies, and progressive religious communities that emphasize human dignity and reason while maintaining some spiritual or communal religious practices.

These varieties share a family resemblance: all center human experience, value reason, and emphasize ethical behavior. But their relationships to religion, science, and metaphysics differ considerably.

The Renaissance: Rediscovering the Human

The Renaissance humanist project began in 14th-century Italy with Petrarch, who is often called the “Father of Humanism.” His passion was recovering and studying ancient Greek and Roman texts — philosophy, literature, rhetoric, history — that had been neglected during the medieval period.

This wasn’t anti-religious. Medieval education was dominated by Scholasticism — systematic theology focused on reconciling Christian doctrine with Aristotelian philosophy. Renaissance humanists didn’t reject Christianity; they expanded what educated people should study. The studia humanitatis (studies of humanity) — grammar, rhetoric, history, poetry, and moral philosophy — joined theology as essential knowledge.

The effects were profound. When you study Homer, Cicero, and Seneca alongside the Bible, you encounter sophisticated ethical thinking that predates Christianity. You encounter tragedy, comedy, and beauty created by pagans. You encounter a civilization (ancient Rome) that achieved extraordinary things without Christian guidance. This didn’t prove Christianity wrong — but it proved Christianity wasn’t the only source of wisdom, beauty, or moral insight.

Leonardo da Vinci, Michelangelo, and Raphael expressed humanist ideals through art. The shift from medieval art (flat, symbolic, focused on religious narratives) to Renaissance art (three-dimensional, anatomically accurate, celebrating human beauty and emotion) reflects the humanist elevation of human experience as worthy of attention and celebration in its own right.

Erasmus of Rotterdam (1466-1536) represents Renaissance humanism at its most sophisticated. A devout Christian and ordained priest, Erasmus used humanist scholarship to criticize Church corruption, advocate for education reform, and argue for religious tolerance. His In Praise of Folly satirized clerical ignorance and superstition. His Greek edition of the New Proof exposed translation errors in the Latin Vulgate that had shaped Church doctrine for centuries. Erasmus proved that humanism and faith could coexist — though the Reformation that followed would complicate that relationship.

The Enlightenment: Reason Takes the Lead

If Renaissance humanism expanded the curriculum, Enlightenment humanism changed the epistemology. The core question shifted from “What does the Bible/Aristotle/tradition say?” to “What does evidence and reason show?”

This shift had specific intellectual triggers. The Scientific Revolution (Copernicus, Galileo, Newton, Kepler) demonstrated that systematic observation and mathematical reasoning could explain natural phenomena better than scriptural interpretation. If the Church was wrong about the Earth being the center of the universe — a claim it defended for centuries — what else might it be wrong about?

John Locke’s empiricism argued that all knowledge comes from experience, not innate ideas or divine revelation. David Hume pushed further, questioning whether we could know anything beyond what our senses directly report. Voltaire used satire to attack religious intolerance, superstition, and clerical power. Denis Diderot’s Encyclopédie attempted to organize all human knowledge on rational principles — a humanist project if there ever was one.

The political implications were enormous. If humans could reason their way to ethical truths, they didn’t need kings or priests to tell them right from wrong. The American Declaration of Independence (“We hold these truths to be self-evident…”) and the French Declaration of the Rights of Man and Citizen are Enlightenment humanist documents — grounding rights in human nature and reason rather than divine grant.

Kant’s famous essay “What Is Enlightenment?” (1784) defined it as humanity’s emergence from “self-imposed immaturity” — the inability to use one’s own reason without another’s guidance. “Sapere aude!” he wrote — “Dare to know!” That phrase captures the Enlightenment humanist spirit precisely.

Modern Secular Humanism: The Full Package

By the 20th century, humanism had crystallized into a coherent worldview with several key commitments.

Naturalism

Secular humanists maintain that the natural world is all there is. No supernatural beings, forces, or dimensions exist — or at least, no evidence supports their existence. This isn’t a claim of absolute certainty (few humanists say “I know there’s no God”), but a methodological commitment: natural explanations are preferred because they’re testable, and supernatural explanations have consistently failed when tested.

This doesn’t mean humanists are dismissive of mystery or wonder. Many humanists write eloquently about awe at the natural world. Carl Sagan, a prominent humanist, said: “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff.” That’s not a religious statement — it’s a scientific one — but it expresses profound wonder.

Ethics Without God

The question “Can you be moral without God?” is, to humanists, easily answered: obviously yes. Billions of non-religious people live ethical lives. Secular democracies with low religiosity (Scandinavia, Japan, the Czech Republic) have lower crime rates, higher life satisfaction, and stronger social safety nets than many highly religious societies.

But humanist ethics isn’t just “morality without religion.” It offers a positive framework:

Well-being matters. Actions that increase human (and animal) well-being are good; actions that decrease it are bad. This consequentialist approach evaluates morality by outcomes rather than by conformity to divine commands.

Empathy is primary. The capacity to understand and share others’ feelings is the emotional foundation of ethics. Humanists argue that empathy — a biological trait shaped by evolution and developed through socialization — provides a natural basis for moral behavior without supernatural motivations.

Reason refines empathy. Empathy alone can be biased (we feel more empathy for people who look like us) and limited (we can’t feel empathy for millions simultaneously). Reason corrects these limitations by establishing principles — fairness, justice, rights — that apply consistently regardless of personal emotional reactions.

Ethics evolves. Unlike religious moral codes that claim timeless authority, humanist ethics explicitly acknowledges that moral understanding improves over time. Slavery was once widely accepted; now it’s universally condemned. Women’s equality was once radical; now it’s mainstream. This moral progress is possible because humanists don’t anchor ethics to unchangeable texts.

Science as the Best Way of Knowing

Humanists view science not as one way of knowing among many but as the most reliable method for understanding how the world works. Not because scientists are infallible — they’re not — but because the scientific method includes built-in correction mechanisms: peer review, replication, falsifiability, and revision in light of new evidence.

This distinguishes humanism from both religious faith (which appeals to revelation and authority) and postmodern relativism (which questions whether objective truth exists). Humanists argue that while our understanding of truth is always incomplete and provisional, some claims are better supported by evidence than others — and those are the claims we should act on.

Human Dignity and Rights

The Universal Declaration of Human Rights (1948) — drafted with significant humanist influence — begins: “All human beings are born free and equal in dignity and rights.” This is a humanist axiom: human dignity is inherent, not contingent on belief, nationality, ethnicity, or social status.

In practice, this commits humanists to defending free expression, religious freedom (including freedom from religion), democratic governance, education access, gender equality, and LGBTQ+ rights. The Humanists International organization specifically advocates for these causes globally, including in countries where non-belief is criminalized — at least 13 nations prescribe the death penalty for apostasy or atheism as of 2024.

Critiques of Humanism — and Honest Responses

No philosophy worth taking seriously goes unchallenged. Here are the main criticisms and how humanists typically respond.

”Without God, anything is permitted” (Dostoevsky)

The claim that morality requires divine authority is perhaps the oldest critique. Humanists respond with the Euthyphro dilemma (from Plato’s dialogue): Is something good because God commands it, or does God command it because it’s good? If the former, morality is arbitrary — God could command genocide and it would be moral. If the latter, goodness exists independently of God, and we can access it through reason.

Empirically, the correlation between religiosity and moral behavior is weak. Religious and secular populations show similar rates of charitable giving (when religious donations to churches are excluded), volunteering, and interpersonal kindness. Some studies show that religious priming increases prosocial behavior in laboratory settings, but field studies are less conclusive.

”Humanism is arrogant”

Some critics argue that placing humans at the center of moral consideration is species-centric arrogance. Environmental philosophers and animal rights advocates challenge humanism to extend moral concern beyond our species.

Many modern humanists accept this criticism and have expanded their ethical circle. The Humanist Manifesto III includes environmental stewardship. Prominent humanists like Peter Singer argue explicitly for animal welfare on humanistic grounds — if suffering matters, all suffering matters, not just human suffering.

”Humanism has no answer to suffering and death”

Religious traditions offer consolation through afterlife beliefs, divine purpose, and cosmic justice. Humanism offers… what? No heaven. No “everything happens for a reason.” No ultimate fairness.

Humanists acknowledge this honestly. Some suffering is meaningless. Death is final. But humanists argue that accepting this reality — rather than denying it — motivates making this life better. If there’s no afterlife compensation, injustice in this life matters more, not less. If death is final, every moment of life is more precious, not less.

Albert Camus, though not calling himself a humanist specifically, captured this spirit: “In the midst of winter, I found there was, within me, an invincible summer.” Meaning is created, not discovered — and created meaning can be deeply sustaining.

”Humanism led to the horrors of the 20th century”

This claim — that secular ideologies (Communism, Fascism) produced history’s worst atrocities — appears to indict humanism by association. But this conflates secularism (absence of religion) with humanism (a specific ethical philosophy). Soviet Communism was explicitly anti-humanist — it subordinated individual dignity to state ideology. Fascism rejected Enlightenment values entirely. Neither followed humanist principles; both violated them fundamentally.

Humanists don’t claim that removing religion automatically produces good outcomes. They claim that human reason, empathy, and democratic principles — specifically — produce better outcomes than alternatives. The evidence, looking at modern secular democracies, supports this claim.

Humanism in Practice Today

Humanist Communities

Without churches, how do humanists build community? Through organizations like the American Humanist Association, Sunday Assembly (a secular “church” movement), Ethical Culture societies, and humanist student groups. These provide social connection, life ceremonies (humanist weddings, funerals, and baby-naming ceremonies), and ethical discussion forums.

The Sunday Assembly movement, founded in London in 2013, holds monthly gatherings with live music, readings, talks, and moments of reflection — structurally similar to church services but with no prayer, no scripture, and no supernatural content. Chapters exist in dozens of cities worldwide. Attendance data suggests they draw both lifelong non-believers seeking community and formerly religious people who miss the social structure of church.

Humanist Ceremonies

An estimated 30% of UK weddings and a growing proportion of funerals are now conducted by humanist celebrants. Humanist ceremonies focus on the individuals — their stories, relationships, and values — rather than on religious ritual. They’re personalized, non-formulaic, and often include readings from literature, philosophy, or science rather than scripture.

In Scotland, humanist weddings have been legally recognized since 2005 and now outnumber Church of Scotland weddings. Similar legal recognition has spread to Ireland, New Zealand, and several other countries.

Humanism and Education

Humanists are strong advocates for secular education — schools that teach about religions (comparative religion) without promoting any specific one. They oppose creationism in science classes, mandatory prayer, and religious tests for public office.

But humanist educational philosophy goes beyond church-state separation. It emphasizes critical thinking, scientific literacy, ethical reasoning, and exposure to diverse perspectives. The goal is producing citizens who can think independently — echoing Kant’s “dare to know” across the centuries.

The Demographics of Non-Belief

Humanism exists within a broader trend of increasing secularization. The “nones” (people with no religious affiliation) are the fastest-growing demographic category in American religion. In 2024, about 28% of American adults identified as religiously unaffiliated — up from 16% in 2007. In Europe, the shift is more dramatic: less than 25% of UK adults, less than 20% of French adults, and less than 10% of Czech adults attend religious services regularly.

Not all “nones” are humanists — many are “spiritual but not religious,” agnostic, or simply indifferent. But the growth of organized humanism tracks this demographic trend. Humanists International represents over 160 member organizations in 70+ countries. The movement is growing fastest among younger, educated, urban populations in developed countries.

Where Humanism Goes from Here

The 21st century presents humanists with challenges their 20th-century predecessors didn’t face. Artificial intelligence raises questions about consciousness, personhood, and moral status that human-centered ethics wasn’t designed to address. Climate change demands global cooperation that humanist individualism alone may not produce. Genetic engineering forces decisions about human nature that neither reason nor empathy clearly resolves.

Humanism’s strength — its adaptability — is also its answer to these challenges. Because humanist ethics isn’t fixed in ancient texts, it can evolve to address new questions. But evolution requires engagement, debate, and willingness to revise — the very qualities humanism most values.

The core insight remains: humans are capable of building ethical, meaningful, fulfilling lives using the tools we already have — reason, empathy, creativity, and community. We don’t need cosmic permission. We don’t need supernatural reward. We need each other, and we need the courage to think clearly about what matters.

That’s been humanism’s message, in various forms, for six centuries. It’s not a bad message for the seventh.

Frequently Asked Questions

Is humanism a religion?

Most humanists say no — humanism is a philosophy or life stance, not a religion. It has no worship, scripture, clergy, or belief in the supernatural. However, some forms (like 'religious humanism' in certain Unitarian Universalist congregations) function somewhat like religions in providing community, ceremonies, and ethical frameworks. The US Supreme Court has recognized secular humanism as functionally equivalent to religion for certain legal purposes.

Can you be a humanist and believe in God?

It depends on the type of humanism. Secular humanism explicitly sets aside supernatural beliefs. But Renaissance humanism was practiced by devout Christians, and 'religious humanism' accommodates theistic belief. The key dividing line is whether your ethical framework derives from divine authority or from human reason and experience.

What do humanists believe about morality?

Humanists believe ethics can be grounded in human reason, empathy, and the observable consequences of actions — without requiring divine commands. They generally emphasize human well-being, individual rights, democratic principles, compassion, and personal responsibility. Humanist ethics tends to be consequentialist (focused on outcomes) rather than deontological (based on fixed rules).

How is humanism different from atheism?

Atheism is simply the absence of belief in gods — it says nothing about values, ethics, or how to live. Humanism is a positive philosophy that includes ethical principles, a commitment to reason and science, and a focus on human flourishing. Most secular humanists are atheists or agnostics, but humanism goes far beyond non-belief by offering a framework for meaning and morality.