Apologetics · Creation — “given enough time” is the load-bearing wall of the Darwinian story, and it is the part nobody checks
Ask almost anyone how random mutation could have produced a functioning eye, a bacterial motor, or the machinery that copies DNA, and you will get some version of the same answer:
Given enough time, anything can happen.
It is said with total confidence, usually in a tone that ends the conversation. And it sounds reasonable, because we all have an intuition that long enough stretches of time can accomplish surprising things. Water carves canyons. Continents drift. Given four billion years, why not a cell?
Here is the problem, and it is not a theological problem. It is an arithmetic one. Time is not a mechanism. Time does not do anything. It is the arena in which a mechanism operates, and if you want to claim a result, you have to show that the mechanism can reach it within the arena you actually have. Deep time is not an answer to that question. It is a way of avoiding it.
What “Enough Time” Actually Has to Cover
Let us be scrupulously fair to the Darwinian account, because a case worth answering deserves to be stated at full strength.
Natural selection is not random. That is the standard and correct correction, and it must be granted. Mutation supplies variation blindly; selection then filters it non-randomly, preserving what works. So the process is not one long lottery — it is a lottery with a ratchet.
Fine. But the ratchet only engages on something that already works. Selection cannot preserve a partial improvement that confers no advantage yet, because there is nothing for it to see. Which means the burden falls entirely on the random half of the process to produce, unguided, the first functional version of a thing — a protein that folds and does a job, a gene that codes for something useful, a system whose parts do nothing individually.
So the honest question is not “can time plus selection refine a working system?” It plainly can. The question is: how long does blind search take to arrive at a working system in the first place, and do we have that long?
The Size of the Search Space
This is where the numbers stop cooperating with the story.
Proteins are chains of amino acids, twenty possible at each position. A very modest protein of 150 units has 20 to the 150th possible sequences. That number is not large in the way a national debt is large. It is larger than the count of atoms in the observable universe by a margin that makes the comparison useless.
Now, functional sequences are not a single point in that space — there are many workable variants, and defenders of the standard account rightly emphasize this. But even on generous estimates of how common functional folds are, the ratio of working sequences to possible ones remains vanishingly small.
And here is the constraint nobody can wave away: the universe has a finite budget. A finite number of particles. A finite number of events since the beginning. Roughly ten to the eightieth atoms, and something on the order of ten to the one-hundred-fortieth total particle interactions available in cosmic history. That is the entire ledger. Every trial the process could ever have run, everywhere, at once, has to fit inside it.
When the search space is orders of magnitude larger than the total number of trials the universe could ever perform, adding more time does not close the gap. It is not a shortage of years. It is a shortage of universe.
The Honest Objection, and What It Does and Doesn’t Fix
A serious biologist will answer immediately: nobody claims a modern protein assembled by pure chance in one shot. Evolution proceeds by co-option, duplication, and incremental modification of what already exists. Existing genes get copied and repurposed. Function is borrowed, not invented from scratch.
That is a real and substantive response, and it should be taken seriously rather than dismissed. It genuinely reduces the size of some searches.
But look closely at what it assumes. Co-option requires something to co-opt. Duplication requires something to duplicate. Every one of those mechanisms is a way of rearranging existing functional information — which means the account works beautifully once you already have a library of working parts and a system that copies them with high fidelity. It explains editing. It does not explain the arrival of the library.
And the deeper you push toward the origin, the worse it gets, because at the very beginning there is no replication yet — and without replication there is no selection at all. Selection is a consequence of heredity. It cannot be the explanation for how heredity got here. At the first step, the ratchet is not installed, and blind search is running alone against a search space that the whole universe cannot exhaust.
Why Big Numbers Fool Us
Our intuitions were built for counting sheep, not for exponents. “Four billion years” sounds functionally infinite to a creature who lives eighty. So when someone says given enough time, our minds hear given infinity, and we stop calculating.
But four billion years is not infinity. It is a specific, finite, checkable quantity — and against combinatorial spaces it is small. This is why “deep time” functions less like a hypothesis and more like a sedative. It quiets the question without answering it.
Ask the follow-up question sometime, gently and without a smirk: Enough time for what, exactly, at what rate, out of what search space? In my experience the conversation gets much more interesting, and much more honest, the moment those numbers have to be named out loud.
What This Argument Is Not
Two guardrails, because Christians damage the case when we overclaim.
- This is not a proof of God from probability. Improbability alone does not establish a Designer. Every specific shuffle of a deck is astronomically improbable, and nobody infers agency from it. The argument only has force when improbability is combined with independent specification — a target defined ahead of time, which is exactly what functional biological information is.
- This is not “science has no answers, therefore God.” Gaps close. Arguments built on ignorance eventually collapse and take a young believer’s faith with them. The claim here is narrower and sturdier: what we have positively learned about the size of sequence space and the finitude of cosmic resources counts as evidence, not as a placeholder for missing evidence.
And a note on our own house: believing Christians disagree about the age of the earth, and this argument does not settle that. A young-earth reader and an old-earth reader can both stand here. In fact, the old-earth Christian is in the more pointed position — he grants the full four billion years and still finds the budget insufficient.
The Better Explanation
When we find specified, functional information anywhere else in the world — a legal contract, a software routine, a message spelled out in stones — we do not hesitate for a second about its cause. We infer a mind, immediately and without embarrassment, because a mind is the only cause we have ever observed producing that kind of thing.
The Christian is not smuggling that inference in from outside. He is applying it consistently, and the text he reads had already named the source:
“All things came into being through Him, and apart from Him nothing came into being that has come into being.”
John 1:3, NASB1995
The Word — Logos, reason, intelligible speech — stands at the origin of things. That is not a poetic flourish grafted onto biology. It is precisely the category of cause that the data keeps demanding.
“For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse.”
Romans 1:20, NASB1995
One Last Thing
If you are the believer in the room who has felt outgunned in this conversation, hear this: you are not required to win an argument to hold your faith honestly. You are required to think clearly and refuse to be bluffed.
And if you are the skeptic who came here to see whether the Christian would cheat — I hope you noticed that the strongest version of your position got stated, and the limits of my own argument got named. That is what confidence looks like. Truth does not need the other side misquoted.
Time is not a mechanism. It never was. The question was always what put the information there — and the oldest answer in the book is still the only one that has ever explained a message by pointing to someone who spoke.
Teaching the Word. Watching the Times.
— SmithForChrist