The Biggest Lie Ever Told Is Only Four Words Long

This year, We Don’t Have Time turns ten. Which means I have spent ten years inside the climate crisis, more or less around the clock. My two youngest children have never really known a father whose work was anything else. Ten years of broadcasts, climate weeks and COPs across continents. Ten years of being away, working late, raising money and fighting to keep this work alive.

After ten years, I thought I would feel that we had accomplished something. That all those years, all that work, all that sacrifice had moved us somewhere.

Instead, I mostly feel exhausted.

Because the crisis did not slow down while we worked on it. After ten years, it feels more urgent than the day we started. And watching the summer of 2026 unfold, that exhaustion has deepened into something closer to grief. Because I can finally name the thing that has been killing us, and it is not carbon dioxide.

It is a lie. I believe it is the biggest lie ever told, and I will show you why I have come to that conclusion. It is not shouted by extremists. It is spoken calmly, by reasonable people, in parliaments, boardrooms and news studios. It is only four words long:

Be precise about which lie I mean, because the wrong one gets all the attention. The deniers who claim there is no problem are a distraction. Barely 15 percent of Americans still believe them. The lie that actually governs the world is the respectable version: the one that accepts the science, praises the Paris Agreement, and schedules the solution for a decade that keeps moving. The film director Adam McKay, who made Don’t Look Up, recently named this exact lie: climate change is real, but not urgent. Keep doing what you’re doing.

The lie had authors. Researchers found that Exxon’s own climate models from 1977 onward predicted global warming with remarkable accuracy while its public messaging said the opposite. But here is what makes it the perfect crime: the lie no longer needs liars. It survives because it is comfortable, because it flatters the institutions repeating it, and because contradicting it sounds extreme. The biggest lies are never enforced. They are hosted.

And the truth it hides is this: it is already too late. Too late to avoid catastrophe, because the catastrophe has started. What is not too late, and everything in this article hangs on the distinction, is deciding how big it becomes. We wrote that distinction into our manifesto when we founded We Don’t Have Time: the question is no longer whether catastrophe comes, but the extent of it, and whether it breaks our societies.

I reread those lines this summer. Ten years ago they were a warning. Today they are a description.

In 2024, for the first time, a full calendar year exceeded 1.5°C above pre-industrial levels.

This June, during the record-breaking heatwave across Western Europe, 10,650 excess deaths were recorded in a single week. Not projections. Not future victims. People who were alive eight weeks ago, in Europe, one of the richest and best-prepared regions in the world.

And it is only where the curve begins. The IPCC projects an excess of 250,000 deaths per year by 2050, with high confidence. That is 25 weeks like the one Europe just lived through, every single year, within the working life of everyone reading this. And it is a deliberately conservative estimate: it counts only four causes of death and leaves out storms, floods, wildfires, conflict and migration entirely.

Yet our politics still speaks in the future tense, and our leaders act on the tense, not the facts. This summer, while three heatwaves hit Europe in three months, I documented 45 climate policy reversals in one year, across 15 jurisdictions, six of them landing during the heatwave itself. Not one of those decisions is possible without the four words. Nobody weakens a carbon market or reopens Arctic oil blocks while believing we don’t have time. Every reversal is the lie, written into law.

I did not reach for that superlative lightly. Ten years inside this crisis forces you to study how societies lie to themselves, and I have spent a long time with the other candidates. So count the dead with me.

The pattern never changes. The facts were known early. The lie was maintained not by villains but by institutions protecting their comfort. And the respectable press rarely lied outright; it whispered. It printed the known catastrophe small, on the inside pages, hedged with doubt, while the front page carried the ordinary news of the day. I recognize that whisper every time a record-shattering heatwave runs below the fold.

People reach for “the earth is flat” as history’s biggest lie. Revealing mistake: educated people have known the earth is round since antiquity. The truly big lies are never about facts nobody knew. They are about facts everyone in power knew. Judge the four words that way, on three dimensions.

Then there is the body count still scheduled. A Nature Communications study, looking only at temperature-related deaths, estimated 83 million additional deaths by 2100 in a world that reaches 4.1°C of warming and finds 74 million of them still preventable through rapid decarbonization. That is the conservative estimate. The other estimate comes from actuaries, whose job is to measure risk. In its Planetary Solvency report, the Institute and Faculty of Actuaries and the University of Exeter classify 2°C or more of warming by 2050 as a risk of more than two billion deaths and at least 25% of global GDP lost. At 3°C or more, they classify the risk as extreme with more than four billion deaths.

These are not forecasts. They are risk scenarios, calculated in much the same way insurers assess the chance and cost of disasters. And notice: we do not call actuaries alarmists when they make us insure the house against a fire that will probably never come. We pay the premium, because the loss would be unsurvivable. This is that mathematics, applied to everything.

How can serious institutions be this far apart? Because they measure different things. The IPCC’s number is a floor: four causes of death, counted one at a time, assuming functioning societies and successful adaptation, in a process every government including the petrostates signs off on. Researchers who studied the IPCC’s track record found it systematically understates what then happens, erring, in their words, on the side of least drama. The actuaries ask what the floor cannot: what happens when the impacts stop taking turns, when crop failures become food crises become migrations become wars. The truth almost certainly lies between the floor and the scenario, and that uncertainty is not a comfort. It is the problem. Yet notice which number gets quoted in parliaments. Always the floor. The lie’s most elegant trick is to take science’s hard-won caution, built as armour against the deniers, and read it back to us as reassurance.

I have sat with that number for months, and I still do not know what to do with it. The deadliest event in our history, the Second World War, killed roughly 70 to 85 million people. The actuaries are describing a risk twenty-five times that size, and at 3°C, fifty times, inside the lifetime of children who are in school today. Read that again. And remember that a risk, unlike a forecast, is exactly the kind of thing you are supposed to act on before you know for certain.

And here is the sentence I have avoided writing for ten years, because it is too harsh for most leaders to say out loud and, honestly, too harsh even for me to think out loud: this is no longer the worst case. The UN’s Emissions Gap Report puts current policies on a path toward up to 2.8°C of warming. The catastrophe the actuaries priced is not the tail of the curve anymore. It sits on the road we are actually driving.

I live inside this crisis every waking day, but most of my work is about solutions. I talk about the progress we are making, the technologies scaling, the people building, the reasons not to give up. And I believe all of that. But I also know it is not happening fast enough.

That is the part I still struggle to carry home. How do I spend all day talking about progress, then look at my own children and explain that we are still not doing enough, and that they may end up paying an unbearable price because we kept telling ourselves there was still time?

So I do what most parents do. I ask about school. We eat dinner. We talk about ordinary things. And for a few hours, I try to live as though these were ordinary times.

Most of us who know, leaders, scientists, journalists, parents, still soften the truth when the subject actually comes up with the people we love. I do it too. And every time we do, the lie gets one more host.

That is my confession.

This article is me stopping.

So let me say the thing that is equally true, and that I can say to my children while looking them in the eye: none of this is determined. Not one of those deaths has happened yet. The gap between the road we are on and the road we could take is not fate. It is decisions, made by people with names, offices and elections to lose. The biggest lie ever told is the one we are living inside right now, and it can still be called out in time.

If the scale is hard to feel, make it smaller. Imagine your child’s school discovered the building was slowly filling with a gas that could give children cancer when they grow up, and instead of telling you, it sent home cheerful newsletters. The teachers knew, the principal knew, the board knew, and every parent meeting ended the same way: we are aware, there is time, the children will be fine.

You would not call that caution. You would never forgive it. Now understand: that school is the world, and every child alive today is enrolled in it.

The first part of their sentence is already decided. The children alive today will grow up in a harder world than they needed to. Hotter summers, costlier food, more dangerous storms. That is what forty years of the four words already bought, and no honesty can refund it. But the second part is still being written, in the same rooms where the 45 reversals were decided. Let the lie run another decade, and we hand our children the world the actuaries priced. Call it out now, and we hand them a hard century, but a livable one.

A harder life, or the risk of no livable life at all. That is the choice the four words are quietly making for our children. That is what is at stake every time a leader, an editor or a dinner guest says them and everyone politely nods. Every parent knows the instinct to say “everything will be okay.” It is love, and it is exactly the instinct this lie exploits. This is the lie’s deepest food source, and the hardest thing I have learned in ten years: it is not sustained mainly by greed. It is sustained by decent people who need it, because the truth feels unsayable to the people they love. But there is a difference between comforting a child and lying to one. Comfort says: something is wrong, and I am doing everything I can. The lie says: nothing is wrong. Our children will know which one we chose, and if we choose wrong, they will ask us the only question that will matter:

And just as the first lie becomes impossible to sustain, its successor arrives: “It is too late, so nothing matters.”

You can watch it being normalized. The Telegraph in the UK recently ran a widely shared and debated column by its editor under the headline “We’ve lost the war against climate change. Time to scrap net zero.” Climate change is real, he concedes. But the battle is lost, so why keep fighting?

This is the second lie, and it grows straight out of the first one. For decades we were told there was still time. That climate change was a problem for later. And now, when later has arrived, we are suddenly told the opposite: it is too late, so why even try?

But look at where both arguments lead. “We have more time” kept fossil fuels flowing for decades. Now “it’s too late” risks doing exactly the same thing for decades more.

The truth sits between the two lies. It is harsher than “we have more time,” but far more hopeful than “it is too late.” Yes, it is too late to avoid all the damage. But it is absolutely not too late to save tens of millions of lives. And that is only the floor, counting heat alone. Those 74 million preventable deaths are not inevitable. They depend on what we do next. Every tenth of a degree matters, and every fraction of warming we avoid means fewer people dying.

And to be clear: reasonable people can disagree about technologies, costs and which path we should take. The debate is about how we act. The lie is that we can afford to wait.

And here I must finish the confession I began earlier, because it has a professional half.

For ten years, my rule as a climate communicator has been to lead with solutions. Never panic. Always pair the dark fact with a way forward. Together with my co-founder David Olsson and our colleagues, we built an entire media platform around that principle. And I still believe in it, because I have seen what despair does to people: they stop. But this summer I understood something I did not want to understand. All those years, when I talked about the progress but softened the urgency, I was not always fighting the lie. Sometimes I was helping to host its friendliest version.

So let me say it properly this time. Both halves, welded together.

The progress is real, and it is not small. The world now invests roughly two dollars in clean energy for every one dollar in fossil fuels. This past year, solar delivered the largest annual generation increase any electricity source has achieved in history, and one in four new cars sold worldwide was electric. We are solving this. The machine is built. It is running. The transition is real. That is not hope. That is data.

And now the half I used to downplay. We are solving it too slowly for it to matter enough, and the entire gap between the speed we have and the speed we need is the lie’s work, defended meeting by meeting in the rooms where the 45 reversals were decided. That gap is not measured in percentage points. It is measured in people. The mortality study I cited earlier contains a number built for exactly this: in its central estimate, roughly every 4,400 tonnes of CO2 costs one human life this century, counting heat deaths alone. Humanity emits about 100 million tonnes every day. Run the division. Every day inside the four words carries a future death toll of more than twenty thousand people. And the same math runs in reverse: every day we move faster is measured in deaths that never happen, in mothers who get to grow old, in children whose names no study will ever need to count.

The transition is not waiting for permission. It is waiting for speed.

Lies of this size do not die from arguments. Tobacco’s lie fell to internal documents, insiders who stopped cooperating, and courtrooms where the question could finally be asked in public. So will this one. That is why my team documents every rollback, names every lobby meeting, and links every claim to its source. History will not ask whether we had enough evidence. It will ask who lobbied, who decided, and who benefited.

So carry this question into every room where decisions get made. Ask your minister. Ask your CEO. Ask your editor. Ask the columnist who tells you to surrender. And ask it kindly, because most of the people hosting this lie are decent people who have simply never been asked:

The biggest lie ever told is four words long. So is the truth. Ten years ago we made those four words our name, and I finally understand that they refuse both lies at once.

The lie that says relax tells us we have time to wait.

The lie that says surrender tells us there is no point trying.

Both are wrong.