0
0
Alan Greenspan died yesterday at 100 years old.
He had run the Federal Reserve for nineteen years — longer than almost anyone before or since. Four presidents. Six recessions. The dot-com bubble. The aftermath of 9/11. The longest peacetime economic expansion in American history. When he walked into a room, markets listened. When he cleared his throat at a Congressional hearing, reporters transcribed every syllable. He had a nickname: the Maestro. And for two decades, it fit.
The tributes coming in are the kind you’d expect for someone like that. “A towering figure.” “An era of American leadership.” “One of the most consequential economic minds of the 20th century.”
All of that is true.
But there’s another part of his story that’s getting less attention in the obituaries — and it might be the most interesting part.
The Woman Who Shaped His World
In the 1950s, a young Alan Greenspan became part of a tight intellectual circle in New York City that gathered around a Russian-born philosopher and novelist named Ayn Rand. The group called themselves “the Collective” — a deliberate irony, since Rand’s entire philosophy was built on the supremacy of the individual.
She called her philosophy Objectivism. Its core premise: rational self-interest is not just acceptable — it is the highest moral principle. Selfishness, properly understood, is a virtue. Markets are the purest expression of human rationality. Any interference with them — any regulation, any redistribution, any collective constraint on individual pursuit — is a moral corruption of something that would otherwise work exactly as it should.
Greenspan believed this deeply. Not as a policy preference. As a framework for understanding how the world actually works.
When he was appointed to the Council of Economic Advisers in 1974, Ayn Rand stood beside him at the swearing-in ceremony. They had been close friends for twenty years. She had shaped how he thought about markets, about human nature, about what money actually was and what it was for. She didn’t live to see him become Fed Chair — she died in 1982, five years before he took the job — but her thinking lived in everything he built.
The Machine He Built
From 1987 to 2006, Greenspan presided over the expansion of global finance into something that had never existed before. Credit markets deepened. Derivatives multiplied. The philosophy he carried from those 1950s discussions translated, in practice, into a consistent position: trust the markets. They know more than you do. They will self-correct. Rational actors pursuing their own interests will, in the aggregate, produce good outcomes.
In 1996, he stood at a black-tie dinner in Washington and delivered what became the most famous economic speech of his career. Markets were doing things that didn’t quite add up — valuations were climbing far faster than any underlying reality could explain. He looked at the evidence and said, publicly, what almost nobody else in his position would say: “How do we know when irrational exuberance has unduly escalated asset values?”
The next morning, markets around the world dropped.
He saw it. He named it. He understood that the system could behave irrationally, that the assumptions baked into his model weren’t always borne out by how humans actually behaved. And then he went back to running the system anyway — because the framework he’d inherited from Rand didn’t leave much room for what you do when the model doesn’t fit.
The Flaw
October 2008. The financial system had come apart. Banks that had existed for a century were gone. Millions of people had lost their homes, their savings, their retirement. Greenspan sat in a Congressional hearing room and Representative Henry Waxman asked him, directly: “Do you feel that your ideology pushed you to make decisions that you wish you had not made?”
Greenspan paused.
“Yes,” he said. “I’ve found a flaw.”
Not a regulatory flaw. Not a market timing flaw. A flaw in his model of reality.
He had assumed that banks and financial institutions would self-regulate against excess risk because rational self-interest demanded it. In the long run, recklessness would hurt them. So they wouldn’t be reckless. The model was internally consistent — and catastrophically wrong. The short-term incentives said: take the risk. And human beings, even highly rational ones, followed the short-term incentives.
“I still do not fully understand why it happened,” he told the Financial Crisis Commission two years later.
He spent his final decades with that admission on the record. The Maestro, humbled not by a market he couldn’t read but by a model of human nature he’d trusted for fifty years.
The Word That Was Already There
There’s an Aramaic word — mamōn — that has been in the historical literature for two thousand years. It doesn’t translate cleanly into modern English, which is why it sometimes appears untranslated even in English texts: mammon.
It doesn’t mean “money” exactly. It comes from a root that means that in which you place your trust — the framework through which you decide what gives your life security, meaning, and direction. Ancient wisdom teachers used it to describe something they kept observing: humans have a profound tendency to build their inner life around material systems. To make those systems the measure of everything. To organize their loyalties, their anxieties, their definition of enough, and their sense of whether they matter — around mammon.
And what they noticed — the observation that has survived in the literature across two thousand years — is that mammon asks something back. It isn’t passive. A system of trust that comprehensive, that organizing, shapes you. It demands loyalty. It defines what counts as a good outcome, what constitutes a flaw, what matters enough to defend.
The ancient teachers also said this: you cannot serve two masters like this at once. Not because one is morally superior. Because they operate on different floors. Two competing frameworks for what is ultimately trustworthy cannot coexist in the same person without one eventually winning.
Alan Greenspan didn’t just work in finance. He served a system of trust for a century — with genuine conviction, genuine brilliance, and a lifetime of faithful application. And in his eighties, he discovered what the ancient diagnosis had always described: that the model had a flaw. Not a computational flaw. A flaw at the level of what you’re trusting and what that trust is actually capable of delivering.
The Question He Leaves Behind
Most of us will never run the Federal Reserve. Most of us will never sit in a Congressional hearing and account for the fifty-year consequences of our assumptions.
But most of us are running a version of his calculation, quietly, every day. What do I need to feel secure? What measure tells me I’m doing okay? What does enough look like? And is the framework I’m using to answer those questions actually working the way the model says it should?
Greenspan’s most honest line wasn’t the “irrational exuberance” speech. It was the quiet one from 2010: I still do not fully understand why it happened.
That sentence is available to all of us — the willingness to sit with a model that didn’t work the way we expected and ask whether the flaw is in the execution or in the floor itself.
Whatever you find when you look there might surprise you.
Something to Think About
Greenspan spent decades defending a model of reality that turned out to have a flaw. What’s one assumption you’ve been operating on — about money, security, or enough — that you’ve never fully examined?
Share This
- Alan Greenspan died yesterday at 100. He ran the world’s money for 20 years. In his 80s, he admitted he found a flaw in his model of reality. An ancient word had already named what that flaw was. [LINK]
- There’s an Aramaic word — mammon — that means ‘that in which you place your trust.’ It isn’t exactly money. It’s closer to: the entire framework through which you decide what gives your life security and meaning. Alan Greenspan served that framework faithfully for a century. [LINK]
- The Maestro’s most honest line wasn’t ‘irrational exuberance.’ It was this: ‘I still do not fully understand why it happened.’ After 50 years of mastery. Worth sitting with. [LINK]
People Also Ask
Who was Alan Greenspan?
Alan Greenspan (March 6, 1926 – June 22, 2026) was Chairman of the Federal Reserve from 1987 to 2006, serving under four presidents: Reagan, Bush Sr., Clinton, and Bush Jr. He was one of the most influential economic figures in modern history, earning the nickname ‘the Maestro’ for his perceived ability to guide markets through crises. He died on June 22, 2026, at the age of 100.
What is irrational exuberance?
Irrational exuberance is a phrase Alan Greenspan used in a 1996 speech to describe what he saw as unsustainably elevated asset values in financial markets. He was asking, publicly, whether markets had climbed far beyond what underlying economic reality could support. The phrase became famous because global markets dropped significantly after he used it.
What did Greenspan admit after the 2008 financial crisis?
In Congressional testimony in October 2008, Greenspan admitted he had found ‘a flaw’ in his model of reality — his fundamental belief that financial markets would self-regulate through rational self-interest. He said in 2010, ‘I still do not fully understand why it happened.’ This was a significant admission from someone who had spent fifty years defending the idea that free markets, left to operate, would produce good outcomes.
What does mammon mean in the Bible?
Mammon comes from the ancient Aramaic word mamōn, which means roughly ‘that in which you place your trust.’ It does not translate precisely as ‘money’ or ‘wealth’ — it refers to the entire framework of trust someone builds around material things. Ancient wisdom teachers used it to describe the way humans tend to organize their security, identity, and decision-making around material systems, and how that framework demands loyalty in return.
What was Alan Greenspan’s relationship with Ayn Rand?
Greenspan was a member of Ayn Rand’s close intellectual circle, known as ‘the Collective,’ in 1950s New York. Rand’s philosophy — Objectivism — held that rational self-interest is the highest moral principle and that free markets are the purest expression of human rationality. Greenspan absorbed this framework deeply. Rand stood beside him at his swearing-in at the Council of Economic Advisers in 1974. She died in 1982, but her thinking remained at the foundation of his economic worldview throughout his tenure at the Fed.
