I. A Book That Retells the Human Story
In 2011, Israeli historian Yuval Noah Harari published Sapiens: A Brief History of Humankind. It became a global phenomenon, translated into dozens of languages, recommended by everyone from Bill Gates to Barack Obama.
Its ambition is massive – to explain, in one book, how Homo Sapiens went from an insignificant African ape to the species that dominates the entire planet.
Harari's core insight is both profound and subversive – humans conquered Earth not because we were stronger, smarter, or had better tools, but because of a unique ability: to believe in 'fictional stories' at scale.
Bees can cooperate, but only in small groups. Chimpanzees can cooperate, but only among acquaintances. Only Homo Sapiens can get millions – or billions – of complete strangers to work together around a 'commonly believed fictional story.' Nations, religions, laws, currencies, corporations – these are all 'fictional stories,' but they are exactly what makes large-scale cooperation possible.
And for investors, there is one fictional story that matters more than any other – money.
II. The Most Subversive Insight: Money Is Humanity's Most Successful Fiction
Harari's analysis of money may be the most important part of this book for investors.
He says: money is the most successful and universal 'fictional story' ever created by humankind.
A banknote itself has no inherent value – it is just a piece of paper with patterns printed on it. A number in a bank account is nothing in itself. Money has value only because 'everyone believes it has value.' It's a collective, shared fiction.
Harari says: money is the most universal and effective system of mutual trust ever devised. It allows a farmer, a banker, a merchant, and a multinational corporation who have never met to cooperate – because they all trust the same fiction (this paper / this number represents value).
This insight should send a chill down an investor's spine – because it means the wealth you spend your life chasing is, at its core, a 'collectively believed fiction.' Stocks are fictions (a piece of paper representing ownership in a company), currencies are fictions, credit is fictions – the entire financial system is built on 'shared belief.'
And the danger of fictions is that once collective belief collapses, the fiction vanishes instantly. That is exactly what happens in financial crises, currency collapses, and bank runs – it's not material that disappears; it's the 'collective belief' that suddenly evaporates. Understand this, and you understand the deepest fragility of the financial system: it rests on belief, and belief can evaporate in an instant.
III. Three Deep Lessons for Investors
First, understand that 'markets are products of collective belief.' Since money, stocks, and credit are all 'collectively believed fictions,' the market's essence is the sum of collective belief – echoing Soros's reflexivity, Shiller's narratives, and Le Bon's crowd psychology. Market moves up or down are, at base, fluctuations in collective belief. Grasp this, and you stop treating the market as an 'objective truth machine' and start seeing it as 'a gigantic, oscillating system of collective beliefs.'
Second, beware the tail risk of 'belief collapse.' Since the entire financial system rests on 'common belief,' the biggest tail risk is the collapse of that belief – a currency system imploding, a bank run, the instant evaporation of collective belief in a particular asset. This is Taleb's black swan, but Harari gives it a deeper explanation: it is not a 'material collapse'; it is a 'fiction collapse.' For investors, this means: never treat anything 'widely believed' (the U.S. dollar, Treasuries, any seemingly eternal asset) as absolutely safe, because its safety rests on belief, and belief can shift (remember This Time Is Different – government bonds considered absolutely safe have defaulted repeatedly throughout history).
Third, understand 'narrative = value' taken to the extreme in the AI era. Harari says value comes from collectively believed stories. In the AI era, this is pushed to its logical extreme – the astronomical market cap of an AI company is built, to a large extent, on a collectively believed 'story' (AI will change everything). As long as the story is believed, value exists; the moment the story wavers, value collapses. This explains why AI-era valuations are so volatile – they are pure 'belief pricing,' more dependent on 'story' than on 'cash flows' compared to traditional companies.
IV. Where I Disagree with Harari
First, the 'everything is fiction' framework risks sliding into nihilism.
Harari says nations, money, laws, and corporations are all 'fictional stories.' This insight is profound, but it carries a danger – if 'everything is fiction,' then 'nothing really matters, and we can dismiss it all,' which leads into a dangerous nihilism. But the truth is – fictions, although not 'objective entities,' have extremely real consequences. Money is a fiction, but it buys real food. Laws are fictions, but violating them has real consequences. Harari underemphasizes the 'real power of fictions,' which could make readers underestimate the real weight of these 'fictions.' For investors, this is dangerous – you cannot treat money as 'mere fiction' and dismiss it; you must take it extremely seriously.
Second, Harari's own 'grand narrative' is itself a captivating fiction.
Ironically – Sapiens itself is an extraordinarily compelling 'grand narrative.' Harari tells the story of tens of thousands of years of human history as a coherent, smooth, insight-laden tale. But real history is far messier than any single narrative. In pursuit of narrative coherence and impact, Harari makes massive simplifications, generalizations, and even sacrifices accuracy. Many historians criticize him for 'sacrificing rigor for a good story.' This resonates with my general wariness toward all 'grand unified narratives' – the more fluent and compelling a grand narrative, the more you should question how much it simplifies and distorts. Harari reveals that 'humans cooperate through stories,' but he himself conquers you with a brilliant story.
Third, his predictions about the 'future' increasingly resemble mysticism.
The historical part of Sapiens is solid and brilliant, but Harari's later books (Homo Deus, 21 Lessons for the 21st Century) on AI, dataism, and the future of humankind read more like 'high-concept sci-fi mysticism' – grand and engaging, but lacking rigorous foundations. This reminds readers that Harari's strength lies in 'reinterpreting the past,' not 'predicting the future.' For investors, his 'fiction' framework helps you understand the nature of markets (past and present), but don't use his specific predictions about the future to guide investment decisions – they are no more reliable than any other oracle.
Fourth, he underestimates the 'real constraints' behind fictions.
Harari emphasizes the power of fictions (stories create civilization). But he relatively downplays that fictions must be constrained by the real world. A nation can 'fiction' a currency, but if it prints money without restraint, real inflation punishes it. A company can 'fiction' a compelling story, but if it has no real cash flow over the long term, the story will eventually collapse. Fictions are not unconstrained – they are ultimately tested by real material, cash flow, and productivity. Harari talks a lot about 'the power of stories,' but less about 'stories must be delivered on.' For investors, this is precisely the key – how long a story (e.g., the AI narrative, a certain company's vision) can survive depends on whether it can be backed up by real performance.
V. Harari vs. KK: Two Views of Humanity's Future
In my note on Kevin Kelly's Out of Control, I briefly compared Harari with KK. Let me elaborate here.
KK (Kevin Kelly) is a techno-determinist – he believes that technological evolution drives everything, humans are the carriers of technological evolution, and the future is determined by technology's intrinsic logic.
Harari is a story-determinist – he believes that the 'stories' humans believe in (fictions) drive everything, technology is merely a tool of those stories, and the future depends on which stories humans choose to believe.
KK says 'technology will take us to some inevitable future'; Harari says 'the stories we believe determine which future we go to.'
For investors, combining both perspectives – use KK to grasp the direction of technological evolution (AI, cognifying, are technological inevitabilities); use Harari to understand how the value of these technologies is priced by 'collective stories' (AI's market cap is supported by the collective belief that 'AI will change everything').
The deepest synthesis is – technology provides possibilities (KK), but stories determine which possibilities are believed, invested in, and priced (Harari). An investor must track both the real progress of technology (KK) and the durability of the 'collective story' that supports its valuation (Harari). When the story far outruns the real realization of technology, a bubble forms.
VI. In Closing
My biggest takeaway from this book is a clear-eyed awareness of 'everything I chase' – the wealth I spend my life pursuing is, at its core, a collectively believed fiction.
This awareness has two sides.
One side is humility and vigilance – since money, stocks, and the entire financial system rest on 'collective belief,' they are not as solid as they seem. The biggest risk is not that a single company loses money, but that 'collective belief collapses' (currency crisis, systemic bank run, evaporation of belief in a class of assets). This keeps me wary of 'absolutely safe assets' and respectful of tail risk.
The other side is a kind of liberation – since wealth is a fiction, it should not be the entirety of your life's meaning. Harari's perspective, unexpectedly, echoes Camus and Inamori – money (a fiction) can be a tool, but it should not be the purpose; real meaning must be sought elsewhere (relationships, creation, value to others). A person who stakes their entire life's meaning on 'accumulating a fictional number' may, at some point (like certain moments in Buffett's biography), suddenly feel empty.
Harari has a sentence that keeps coming back to me: 'Money is the most universal and effective system of mutual trust ever created by humankind, but it is also the coldest – it doesn't care about skin color, faith, or gender; it only cares about numbers.'
This sentence reveals both money's greatness (it enables strangers to cooperate) and its coldness (it reduces everything to numbers).
As an investor, I deal daily with this 'most successful fiction.' Harari helped me understand its nature – it is powerful because everyone believes it; it is fragile because it rests on nothing but belief; it is useful, but it should not be the entirety of your life's meaning.
Understanding the nature of this fiction lets you both take it seriously (because it has real consequences) and transcend it (because it is, after all, just a story).
That 'both serious and detached' posture may be the healthiest attitude a mature investor can have toward wealth.
