Evolution, Creationism, and the Word Theory

I was reading Why Evolution Is True, and it mentioned some statistics about evolution and creationism that I honestly had trouble believing.

The one that first caught my attention was about high school biology teachers. In a 2007 survey of U.S. public high school biology teachers, around one in eight teachers reported presenting creationism or intelligent design in a positive light as a valid scientific alternative to evolution. The same survey found that about one in six teachers personally believed that God created human beings in their present form within the last 10,000 years.

Those numbers felt wild to me.

Part of that reaction is probably personal. I grew up in an area where no one really talked about being a creationist. I did not knowingly meet someone who believed that until I was in my twenties. So when I saw statistics like that, they did not match the social world I thought I understood.

But, as is often true with statistics, the details matter.

The teacher numbers came from self-reporting. Some teachers may underreport controversial classroom behavior. Some may overstate how much they challenge evolution. Some may bring up creationism only to explain why it is not science. Also, those numbers are old. A later 2019 survey of U.S. public high school biology teachers found improvement: fewer teachers were presenting creationism or intelligent design, and more were teaching evolution as established science.

So the story is not simply: anti-evolutionism is growing.

It is messier than that.

Public opinion polling is also tricky. In the United Kingdom, a 2006 BBC/Ipsos poll found that 48% of adults chose “evolution theory” as the best description for the origin and development of life, while 22% chose creationism and 17% chose intelligent design. The same poll found that 44% thought creationism should be included in school science classes.

At first glance, that sounds like nearly half the country wanted creationism taught as science. But even there, caveats matter. The poll’s evolution option described evolution as a process in which God had no part. That wording may have pushed religious people who accept evolution away from choosing it. And saying something “should be taught” can mean different things: taught as a valid scientific theory, taught as a cultural belief, taught as something to compare, or taught only to explain why it is not science.

More recent UK polling looks less alarming. A 2023 University of Birmingham and YouGov survey found that only 12% of UK adults chose a creationist view in which humans and other living things were created by God and have always existed in their current form. In the same report, over 80% of UK adults agreed that evolutionary processes can explain how living things, including humans, developed.

In the United States, the picture is different. Gallup’s 2024 polling found that 37% of Americans said God created humans in their present form within the last 10,000 years. But even there, the number depends heavily on wording. Pew has shown that when respondents are given a clear option for God-guided evolution, fewer people choose strict creationism.

That is one of the first lessons here: statistics about evolution are not just measuring knowledge. They are also measuring wording, identity, religion, trust, politics, and what people think they are being asked to defend.

Still, even after all the caveats, the numbers are higher than I expected.

And this makes me wonder about something broader. We are living through a period of distrust toward large institutions: government, universities, pharmaceutical companies, media organizations, and scientific authorities in general. Some of that distrust is understandable. Institutions really do fail. Experts really do overstate things. People really have been talked down to.

But distrust has a direction. It can become healthy skepticism, or it can become a reflexive rejection of anything that sounds official. I sometimes wonder whether that atmosphere could create new energy around conspiracy thinking against evolution, even if the old textbook battles over creationism look less dominant than they once did.

That is why I think it is worth stepping back and asking basic questions:

What is evolution?

What is science?

What is a scientific theory?

Because one of the biggest communication problems is hiding in the word “theory.”

In ordinary speech, “theory” often means a guess. If I say, “I have a theory about why he did that,” I probably mean I have a hunch. Maybe I am right. Maybe I am just making a story out of incomplete evidence.

But a scientific theory is not a casual guess.

A scientific theory is a broad explanatory framework that accounts for a large body of evidence. It explains how or why something happens. It organizes observations, makes sense of patterns, and often generates predictions that can be tested.

In that sense, a theory is not a low-status idea waiting to become a law. A theory is one of the top levels of scientific explanation.

That distinction matters because people sometimes talk as if evolution is “only a theory,” meaning it is somehow weaker than a law. But theories and laws do different jobs.

A law usually describes a reliable relationship or pattern in nature.

A theory explains the deeper mechanism behind many observations.

Newton’s law of gravitation describes how objects attract each other with a force related to their masses and distance. It gives a mathematical pattern that works extremely well in normal conditions. General relativity, on the other hand, explains gravity more deeply as the curvature of spacetime, and it works in extreme conditions where Newton’s law is incomplete.

The law is not useless because the theory exists. The theory is not weak because it is not called a law. They work in tandem.

The same thing happens in geology. The law of superposition says that, in undisturbed layers of rock, older layers are generally below younger layers. That is a reliable descriptive principle. The theory of plate tectonics is much broader. It explains large-scale movements of Earth’s crust, mountain formation, earthquakes, volcanoes, ocean basins, and the fit of continents.

Other scientific theories work the same way:

• Germ theory explains how many diseases are caused by microorganisms.
• Atomic theory explains matter in terms of atoms and their interactions.
• Plate tectonics explains the movement and structure of Earth’s crust.
• General relativity explains gravity more deeply than Newtonian mechanics.
• Evolution by natural selection explains how populations change over time and how life diversifies.

None of these are “just theories” in the everyday sense.

They are explanations supported by evidence.

This does not mean science is a pile of absolute certainty. Science is powerful partly because it stays open to revision. Newton was not simply thrown away when Einstein came along. Newtonian gravity still works beautifully for many everyday purposes. But general relativity explained more, predicted more, and handled cases Newton could not.

That is how science often advances. It does not always replace everything with a cartoonish “old wrong, new right” story. Sometimes it nests an older model inside a deeper one.

Evolution is similar in that way. The basic fact that life has changed over time is supported by fossils, genetics, comparative anatomy, biogeography, observed evolution, and more. The details of evolutionary mechanisms continue to be studied, debated, refined, and expanded. But that debate is not evidence that evolution is collapsing. It is what a living scientific field looks like.

The communication problem is that this is hard to compress into a slogan.

“Evolution is only a theory” is short.

“A scientific theory is a high-level explanatory framework supported by evidence, and theories are not lower than laws because laws and theories answer different kinds of questions” is true, but it is not exactly bumper-sticker material.

Maybe that is part of the challenge with scientific communication. The inaccurate version is often emotionally simpler. It gives people a handle. It tells them who is arrogant, who is hiding something, who is trying to indoctrinate their children, who is defending common sense.

The accurate version asks for patience. It asks people to separate evidence from identity, uncertainty from ignorance, theory from guess, and skepticism from suspicion.

That is harder work.

But it also feels necessary.

If people are going to trust science, they need more than declarations that experts are right. They need to understand what science is doing, what kind of claim is being made, how strong the evidence is, what remains uncertain, and why disagreement inside science is not the same thing as collapse.

Evolution is a good case study because the science is strong, the cultural conflict is old, and the word “theory” keeps causing confusion.

The statistics shocked me at first. The caveats calmed them down a little. But they did not make the broader issue disappear.

There are still a lot of people who hear “theory” and think “guess.”

There are still a lot of people who hear “science” and think “institution I do not trust.”

And there are still a lot of people, including me sometimes, who need reminders that good communication is not just about having the right answer. It is about helping someone understand what kind of answer it is.

Sources and Notes

• The 2007 U.S. teacher statistics come from the National Survey of High School Biology Teachers, discussed in “Evolution and Creationism in America’s Classrooms” in PLoS Biology.
• The 2019 update on U.S. biology teachers comes from “Teaching evolution in U.S. public schools: a continuing challenge,” published in Evolution: Education and Outreach.
• The 2006 UK polling figures come from the BBC/Ipsos survey on origins of life.
• The 2023 UK figures come from the University of Birmingham and YouGov report Exploring the Spectrum of Public Views on Evolution and Religion.
• The 2024 U.S. public opinion figure comes from Gallup’s long-running polling on human origins.
• Pew Research Center has useful work showing how much creationism/evolution numbers change when the question wording gives respondents a clear option for God-guided evolution.