What about the age of the earth?

Question 60003.

I hold a young earth position, and I want to tell you why before I tell you how careful I intend to be about it. This is a question where Christians who love the Bible equally have reached different conclusions, and the temperature of the debate has often been higher than the quality of the argument.

So here is the case as I understand it, together with the difficulties I do not pretend to have solved, and a clear statement of what I think actually matters at the end of it all.

Why the young earth question arises at all

Nobody reading Genesis on its own would arrive at billions of years. The figure comes from outside the text, from geology and astronomy, and the question is what to do when the plain sense of Scripture and the prevailing scientific consensus appear to disagree.

There are only three honest options. You can reinterpret the text, you can question the consensus, or you can hold both and admit you cannot reconcile them. The young earth position takes the second route, and I want to be candid that it is a costly one.

It matters that we are honest about the order of discovery. Long ages were proposed before the evidence was in, on the assumption that present rates have always applied, and the framework then shaped how the evidence was read. That is not a conspiracy, it is how paradigms work.

The days of Genesis 1

The Hebrew word is yom, and it can mean a period of time as well as a twenty four hour day, which is true of the English word day too. Context decides, and the context here is unusually helpful.

Each day is numbered and bounded by evening and morning, a construction that in the rest of the Old Testament always describes ordinary days. Exodus grounds the working week in the creation week, saying that in six days the Lord made heaven and earth and rested the seventh, Exodus 20:11, which is a strange thing to write if the days were ages.

So the young earth reading is not a wooden literalism imposed on a poetic text. It is what the grammar most naturally yields, and the burden of proof sits with those who read it otherwise. I look at the wider hermeneutical question in whether literal interpretation requires a young earth.

The genealogies

Genesis 5 and 11 give ages at the birth of the next named son, which is a very unusual thing for an ancient genealogy to do. If you simply add them you arrive at something in the order of six thousand years since Adam, which is where Ussher’s famous date came from.

There is a genuine complication. Biblical genealogies sometimes skip generations, as Matthew does deliberately in his opening chapter, and the Hebrew word for father can mean ancestor. Some gaps are possible, which might stretch the figure.

What the genealogies will not stretch to is hundreds of thousands of years, because the ages at fatherhood are given as numbers rather than implied by succession. A young earth reading may allow a few thousand years of flexibility. It cannot absorb an order of magnitude.

What about the fossils and the rock layers

This is where the flood does the heavy lifting in a young earth model. A worldwide catastrophe involving the fountains of the great deep, massive sedimentation and rapid burial would produce exactly the sort of thing the geological column contains, namely billions of dead things buried in water laid layers across continents.

Uniformitarian geology assumes slow deposition over vast ages, but observed catastrophes such as the Mount St Helens eruption in 1980 laid down finely layered strata many metres deep within days, and carved a canyon system in a matter of hours. Rate assumptions turn out to be doing a great deal of the dating.

I have written on the flood itself in whether Noah’s flood was global. Everything in the young earth position depends on taking that event as a genuine global catastrophe rather than a local inundation described with hyperbole.

Radiometric dating and its assumptions

Radiometric methods are often presented as direct measurements of age. They are not. They measure present ratios of parent and daughter isotopes and then calculate an age using three assumptions, namely the starting quantities, a constant decay rate, and a closed system throughout.

None of those can be verified for the deep past. Where the methods have been applied to rocks of known age, such as lava from recent volcanic eruptions, they have sometimes returned ages of hundreds of thousands or millions of years, which ought to prompt more caution than it usually does.

I do not say this makes the methods worthless. I say that a calculation resting on unverifiable assumptions about the unobserved past is not the same kind of knowledge as a measurement, and a young earth reader is entitled to ask which assumption is doing the work.

The difficulties I do not dismiss

Distant starlight is the sharpest. If a galaxy is millions of light years away and we can see it, the light appears to have travelled for millions of years. Various proposals have been offered, including changes in the speed of light and relativistic time dilation during creation week, and I do not find any of them entirely satisfying.

Ice cores, coral growth, seafloor sediments and tree ring sequences all present chronologies that appear to run past the young earth figure, and the responses to them are technical and contested. Anyone who tells you these are trivially answered has not read the material.

I hold my position knowing that these questions remain open, and I would rather say so than pretend. Faith is not the same as certainty about every detail, and Scripture nowhere asks me to have all the answers before I trust what it says.

Appearance of age, and why I use it carefully

It is often argued that God created a mature world, with trees bearing fruit and a man who never was an infant, so that the creation would necessarily look older than it is. There is something in that. Adam was made an adult, and light from the stars was presumably visible on the day it was needed.

The argument has a limit, and honest young earth writers acknowledge it. Maturity is not the same as a fabricated history. A tree created full grown is one thing. A tree created with two hundred rings recording droughts that never happened is another, and I would not want to attribute that to a God who cannot lie.

So I use the appearance of maturity where it fits the created order and I do not use it as a universal solvent for every dating difficulty. That restraint costs me some easy answers, and I think it is worth the price.

What is actually at stake theologically

The heart of the matter is not the number. It is death. If the fossil record predates Adam by hundreds of millions of years, then disease, predation and extinction ran for ages before any human sinned, and God called that arrangement very good.

Paul writes that sin came into the world through one man, and death through sin, Romans 5:12, and that the creation was subjected to futility and awaits liberation. The young earth position keeps that sequence intact, with a good creation ruined by human rebellion and destined for restoration.

That is why I hold it. Not because the number six thousand appears in a verse, but because the storyline of Scripture runs from a good creation through a real fall to a real redemption, and long ages of death before Adam disturb the middle term.

How to hold this without falling out

The age of the earth is not a test of salvation, and I will not treat it as one. I know godly, careful expositors who hold to an old earth and a historical Adam, and I would happily have any of them in my pulpit.

What I will contend for is the historicity of Adam, the entry of death through sin, and the reality of the flood, because those carry the weight of the gospel. Whether a believer has settled the geology is a different matter from whether he has settled those.

So argue if you must, but notice which hill you are on. Some of the fiercest young earth advocates I have met were fiercer about the calendar than about the cross, and that is a poor trade.

Teaching this to the next generation

Children are told the earth is billions of years old in every museum they visit, and if they only hear a young earth answer shouted rather than explained they will drop it the moment they meet a confident lecturer.

Give them the reasoning instead. Show them the difference between what is observed and what is inferred. Let them see that dating methods rest on assumptions, and let them also see that you know where your own position is under pressure.

A young person who has watched you hold a conviction honestly, including the parts you cannot yet answer, has been given something far more durable than a set of slogans.

So, now what?

Read Genesis 1 to 11 in one sitting and notice that the narrative never changes gear. There is no seam where poetry becomes history, and the New Testament writers treat all of it as real.

Then look at the questions you have quietly filed under too difficult. Bring one of them out, read the best case on both sides, and let your convictions be tested rather than protected.

And keep the main thing central. Whatever you conclude about the young earth question, the God who spoke light into existence is the God who raised Jesus from the dead, and He is not waiting for your geology to be settled before He will meet you. What have you been putting off asking Him?

For in six days the LORD made heaven and earth, the sea, and all that is in them, and rested on the seventh day. Therefore the LORD blessed the Sabbath day and made it holy.

Exodus 20:11, ESV