Are You Missing How Secular Humanism Shapes American Life?

Haven’t you noticed how weird it is? We still say “In God We Trust” on the money, half the country still tells pollsters they pray daily, and yet the actual wiring of American life grows more humanist every single year. That tension deserves a closer look.

Here’s the kicker: you might be a secular humanist right now and have never said the words out loud. Think about the last argument you had about politics, healthcare, or school curricula. What premises did you reach for? Evidence? Fairness? Universal human dignity? The reduction of suffering?

If you answered yes to any of that, you were thinking like a humanist. And, honesty compels me to say it — so are most of the people running this country. Whether you’re delighted, horrified, or just confused by that statement, this essay is for you. Because secular humanism has already reshaped American law, culture, and education more profoundly than most people realize. Let’s unpack it.

What Secular Humanism Actually Is (And Isn’t)

Before we can talk about its footprint on American society, we need a workable definition — because the popular one is awful.

Secular humanism, at its core, is a worldview that grounds ethics in human reason, empathy, and experience rather than divine revelation or supernatural authority. It holds that we can live meaningful, moral lives without religious belief. One representative expression is the Humanist Manifesto III, first published in 2003, which affirms “human beings have the right and responsibility to give meaning and shape to their own lives.”

Now, the part people mess up. Secular humanism is not militant atheism. Atheists deny the existence of gods. Humanists — some of whom are atheists, to be sure — affirm something positive: a commitment to reason, evidence, and the well-being of all people. Plenty of humanists are agnostics. Plenty are even religious humanists, believe it or not, from Unitarian Universalists to Reform Jews who center human dignity alongside cultural tradition.

Humanism also does not mean, as some conservative critics insist, “moral relativism.” Quite the opposite. The tradition draws on ancient Greek ethics, Enlightenment philosophers like Kant and Mill, and modern science to articulate robust, universal moral obligations. Human dignity. Autonomy. Beneficence. Justice. Does that sound like “anything goes”? It shouldn’t.

If you want to understand the worldview in its own words, the American Humanist Association spells it out plainly. What I want to show you next is how it got weaved into the fabric of the country — sometimes through the front door, sometimes through the side window.

The American Inheritance: Humanist DNA

Here’s an uncomfortable thought for the “Christian nation” faction: the American founding was a decidedly Enlightenment affair. Thomas Jefferson, James Madison, Benjamin Franklin, and Thomas Paine were heavily influenced by European rationalism. Paine’s Age of Reason (1794) is openly deistic and scornful of institutional Christianity. Jefferson famously constructed his own Bible by excising every miracle and supernatural event, leaving only the ethical teachings of Jesus.

These men weren’t secular humanists in the modern sense. Jefferson believed in a creator God. But their political philosophy rested on humanist premises rather than scriptural ones. “We hold these truths to be self-evident” — not “as revealed in scripture.” The Declaration of Independence grounds rights in the “Laws of Nature and Nature’s God,” a deistic formulation designed to be intelligible outside any particular church.

The Constitution, famously, never mentions God. Article VI bans religious tests for office. The First Amendment erects a wall between church and state — Jefferson’s own phrase, written in an 1802 letter to Danbury Baptists.

That foundation took a while to sprout humanist institutions. The formal Humanist movement emerged in the early 20th century in response to the trauma of World War I and the rise of scientific modernity. The first Humanist Manifesto appeared in 1933, signed by 34 intellectuals, including philosopher John Dewey. The American Humanist Association took its current name in 1941. The Council for Secular Humanism and the Secular Student Alliance followed in the 1980s and 2001, respectively.

Here’s the thing about movements, though. They don’t need formal organizations to change the culture. They need ideas that resonate with how people already live.

The Numbers Nobody Wants to Argue With

Let’s turn to the data, because this is where the story gets genuinely dramatic. In 2007, the Pew Research Center found that about 16% of American adults were religiously unaffiliated — the so-called “nones.” By 2014, that figure had jumped to 23%. By 2023, the most recent Religious Landscape Study puts it at 28%. Meanwhile, the share of Americans who identify as Christian has fallen from 78% in 2007 to roughly 62%.

Gallup has tracked a parallel collapse in formal religious participation. In 1999, approximately 70% of Americans belonged to a church, synagogue, or mosque. By 2021, that number had dipped below 50% for the first time in the poll’s eight-decade history.

You don’t need a PhD in demography to see where this is going. The median age of an American secular humanist is younger than the median age of an evangelical Christian by a substantial margin. Among Gen Z adults, about 34% are religiously unaffiliated. The future belongs, numerically speaking, to the nones.

Here’s the kicker that the demographers love: the nones are not mostly atheists. Only a small fraction call themselves atheist or agnostic. The overwhelming majority — something like two-thirds — describe themselves as “nothing in particular.” That means they’ve walked away from organized religion without adopting any replacement label. They just live their lives by their own lights.

What does that mean for society? Let’s track the influence across concrete domains.

What the Humanist Movement Built

Before we dive into the sectors, let me acknowledge something that sounds counterintuitive: the secular humanist movement has built real institutions, even if nobody Instagrams them. The American Humanist Association publishes The Humanist, awards the Humanist of the Year, and runs legal advocacy through its Appignani Humanist Legal Center. There are humanist chaplains on dozens of college campuses and in the US military — a development that had religious traditionalists suing on the grounds that secular chaplains shouldn’t receive government funding. They’ve lost those suits.

At the grassroots level, Sunday Assembly chapters — an atheist-humanist “church” movement that started in London in 2013 — now meet in over 70 American cities, complete with songs, talks, and volunteering. Humanist celebrants officiate weddings, funerals, and baby namings for irreligious families who still want ritual and community.

The infrastructure is modest. But its effect on the wider society has been outsized because the ideas moved beyond the institutions.

Law: The Quiet Humanist Takeover

Let’s examine the legal arena, because that’s where secular humanism has achieved its most consequential victories.

Consider Obergefell v. Hodges (2015), the Supreme Court decision that legalized same-sex marriage nationwide. Read the majority opinion by Justice Kennedy and you will search in vain for doctrinal Christian morality. Instead, you’ll find a powerful argument rooted in individual autonomy, dignity, and the sanctity of personal choice. Those are humanist principles, delivered in soaring prose.

The same goes for Lawrence v. Texas (2003), which struck down sodomy laws, and Planned Parenthood v. Casey (1992), which reaffirmed the core of Roe v. Wade by recognizing a constitutional “right to define one’s own concept of existence, of meaning, of the universe, and of the mystery of human life.” That language, famously written by Kennedy and Sandra Day O’Connor, is positively philosophical. It’s a humanist rendering of what human beings deserve.

Even when humanists lose — and Dobbs v. Jackson Women’s Health Organization (2022) was a massive loss — the terms of the debate have shifted. The anti-abortion movement has largely stopped talking about invoking God and instead leans on fetal personhood claims grounded in biology. Those may be contestable, but they’re presented in a secular, evidence-based register. That’s how much humanist thinking has normalized itself. The culture war is now fought inside a humanist framework, with scripture rarely used as the explicit grounds for public policy.

The Establishment Clause jurisprudence — from Everson v. Board of Education (1947) through Engel v. Vitale (1962) and Lemon v. Kurtzman (1971) to Kennedy v. Bremerton School District (2022) — has bounced around. But the baseline assumption of most constitutional lawyers is the same: the state must remain neutral between religion and irreligion. That neutrality principle is a humanist achievement. A Christian nationalist would reverse it tomorrow if they could.

Education: Where the Battle Really Happened

Public schools might be the arena where secular humanism has had its longest, most visible impact — and the place where its influence remains most fiercely contested.

Let’s revisit the timeline. In 1962, the Supreme Court ruled in Engel v. Vitale that officially organized school prayer violated the Establishment Clause. A year later, in Abington School District v. Schempp, the court struck down daily Bible readings. Both rulings provoked massive backlash; evangelical leaders, including Billy Graham, publicly mourned them as national catastrophes. The decisions did not remove prayer from schools entirely. Students can still pray voluntarily. But the state can no longer lead it.

In 1987, Edwards v. Aguillard hit the court, and Louisiana’s equal-time-for-creationism law fell. Subsequent rulings and policies have kept creationism and its friendlier cousin, intelligent design, out of science classrooms. The reason isn’t a conspiracy. It’s that science curricula, at their core, operate on humanist methodology — evidence, peer review, falsifiability — rather than biblical authority.

Now consider the progressive changes in health education, sex education, and social studies curricula over the last several decades. These reflect a humanist commitment to student autonomy over parental or sectarian control. The irony, of course, is that today’s progressive parents are often the first to complain when conservative school boards push “parental rights” legislation. Humanist pluralism cuts both ways, as it were.

Healthcare, Medicine, and Bioethics

Medical ethics might be the quietest humanist victory of all. Trust me, you don’t want to live in a society where healthcare decisions are made by religious authorities. You probably already benefit from humanist bioethics without knowing it.

The doctrine of informed consent — the idea that a patient must be fully educated about risks and alternatives before treatment — stems from post-WWII human rights thinking. It replaced decades of medical paternalism where doctors decided unilaterally, and religious authorities often decided alongside them. Terminal sedation, organ donation, advance directives, and do-not-resuscitate orders all rest, in their modern forms, on patient autonomy and quality-of-life reasoning.

The shift on contraception is perhaps the best historical illustration. In 1965, Griswold v. Connecticut struck down a state law banning contraceptive use by married couples. The court’s reasoning invoked a constitutional right to privacy. That right didn’t come from any particular religious tradition; it came from a belief that individuals have authority over their own intimate lives. By 2000, even the Catholic Church’s full teaching against artificial contraception had become something that most lay Catholics politely ignored. The humanist logic of personal conscience had simply overwhelmed the institutional instruction.

Everyday Ethics: The Humanism You Already Practice

Here’s a dirty secret about secular humanism that might explain its pervasiveness: it’s not very exotic. It’s basically the Golden Rule, writ through the lens of reason and evidence. Most Christians, Muslims, and Jews already practice it most of the time, even when their theology makes claims that would seem to contradict it.

How many humanists does it take to change a lightbulb? Just one — but it’s got to be an LED bulb, from a supplier with verified labor practices, and the old bulb must be recycled responsibly.

The joke is funny because it’s recognizably true. Show me a person who buys fair-trade coffee, separates their recycling, donates to Doctors Without Borders, and reads vaccine package inserts before getting jabbed, and I’ll show you someone living humanist ethics — whatever they check on the census form. Active compassion, scientific literacy, and reflective moral autonomy have become default American behaviors, even among the devout.

Consider the “nones” again. They give to charity at lower rates than weekly-attending Christians, per some studies. But their charitable behavior cuts across secular causes, and their volunteering on non-religious projects equals or exceeds that of the churched. In fact, when sociologists control for religious attendance, the giving gap between believers and nonbelievers mostly evaporates. Kindness is the great equalizer.

The Counterattack: Why the Caricature Sells Short

Let me steelman the opposition, since any honest examination of secular humanism needs to address the widespread skepticism.

Since the late 1970s, the Religious Right, led by figures like Jerry Falwell and Pat Robertson, has cast secular humanism as a malevolent force — a worldview that “ejects God from the classroom,” “threatens the American family,” and leads inevitably to moral anarchy. In 1980, Falwell called secular humanism “the greatest enemy of America today.” The late Tim LaHaye’s bestseller The Battle for the Mind attempted to prove that humanism was doctrinally equivalent to Marxism and existentialism.

It’s worth taking the anxiety seriously, even if the analysis is bad. Many conservative Christians fear that the moral framework of their children is being determined by public schools and popular culture, rather than by the family and the church. Their concern: humanism is an anti-Christian religion, and its spread represents a form of state coercion.

But here’s the problem with the claim. Secular humanism — at least in its own self-understanding — does not require anyone to renounce their faith. It merely requires a public sphere where reasons must be given in terms everyone can access. Religious arguments can enter public discourse under a humanist regime; religious arguments can’t be the final arbiter unless they can pass through the sieve of secular reason.

And the “morally relativistic” smear? It falls apart under the slightest scrutiny. Humanism has been, for a century, among the most robust defenders of universal human rights. Humanists were early advocates for desegregation, for women’s rights, and, yes, for LGBTQIA+ equality. The Humanist Manifesto II in 1973 criticized “the havoc and suffering” caused by dogmatic nationalism and racism. A relativist, by definition, lacks the grounds for such universal condemnation. Humanism possesses those grounds in its insistence that human well-being is objectively worthy of protection.

Can Secular Humanism Hold a Pluralist Society Together?

The deeper question — the one that keeps social scientists up at night — is whether a society can generate shared meaning and commitment without a unifying religious worldview.

The skeptical answer says no. It points to the fractures in American politics and argues, with the French conservative thinker Henri de Lubac, that “we cannot live without the sacred.” The hopeful answer notes that functioning secular democracies — the Nordics, Japan, Canada, New Zealand — are among the world’s most peaceful, prosperous, and socially trusting nations. They are also, American metrics aside, at the very top of global happiness indices.

What they share isn’t a church. It’s strong social welfare states, robust civic institutions, and voluntary associations. In other words, they’ve secularized without atomizing.

We Americans are still figuring that project out. We abandoned the stronger forms of religious cohesion decades ago, and we haven’t finished building the replacement. The humanist alternative suggests that the replacement need not be a single creed at all — but a shared procedural commitment to evidence, an overlapping consensus on human rights, and pluralistic civil society.

It’s a fragile vision. It banks on people engaging in public reasoning rather than shouting past each other. But let’s be fair: what’s the realistic competing vision? A restoration of the Protestant establishment that governed the culture in the 1950s? That world is gone, and pretending otherwise is nostalgia in search of a time machine.

What This Means for You

So — if you’re one of the tens of millions of “nones,” or a doubter still in the pew, or even a traditional believer who longs for a society that once was, what should you walk away with?

First, secular humanism is not the cause of America’s moral decline. It is, in large measure, the consequence of America’s moral expansion. We included more people in the circle of rights than 19th-century Protestantism was comfortable with. We learned — through abolition, women’s suffrage, civil rights, and marriage equality — to take every person’s dignity seriously. The tools we used to reason through those expansions were primarily humanistic, not scriptural.

Second, humanism is not the enemy of faith. It is the guarantor that faith remains voluntary. If you believe that God’s love must be freely chosen, then a secular state is your strange ally, not your adversary.

Third, regardless of what you believe about God, you live in a society whose political and legal reasoning is increasingly humanist. You might as well understand the operating system beneath the interface.

Here’s a final thought, both an invitation and a challenge: secular humanism asks you to show your work. You can’t just say “The Bible teaches it” or “My tradition has always held.” You have to say why something is right, with reasons a Muslim, an atheist, and a journalist from Norway could all evaluate. That’s harder than the old way. It’s also the only way for a pluralistic country to fight its culture wars without permanently tearing itself apart.

And if you’re a believer who feels threatened — take a breath. Humanism isn’t coming for your church. It’s coming for the privilege your church once had to tell the public school, the courthouse, and the hospital what everyone else must do. That privilege was surrendered generations ago, in case you haven’t checked the dates.

Secular humanism isn’t going to save America any more than Christianity did. It can’t conjure a revival. But it’s here, it’s alive, and it’s making you think. Honestly, that might just be the best gift it can give. After all, in an age of tribal rage and algorithm-driven polarization, a little more mindful deliberation wouldn’t hurt anybody.