Beware those Black Swans

The bestselling economist Nassim Nicholas Taleb argues that we can’t make the world financial system

After completing my book The Black Swan, I spent some time meditating on the fragility of systems with the illusion of stability. This convinced me that the banking system was the mother of all accidents waiting to happen. I explained in the book that the best teachers of wisdom are the eldest, because they may have picked up invisible tricks that are absent from our epistemic routines and which help them survive in a world more complex than the one we think we understand. So being old implies a higher degree of resistance to "Black Swans" (events with the following three attributes: they lie outside the realm of regular expectations; they carry an extreme impact; and human nature makes us concoct explanations for their occurrence after the fact).

Take Mother Nature, which is clearly a complex system, with webs of interdependence, non-linearities and a robust ecology (otherwise it would have blown up a long time ago). It is a very old person with an impeccable memory. Mother Nature does not develop Alz­heimer's - and there is evidence that even humans would not easily lose brain functions with age if they took long walks, avoided sugar, bread, white rice and stock-market investments, and refrained from taking economics classes or reading the New York Times.

Let me summarise my ideas of how Mother Nature deals with the Black Swan. First, she likes redundancies. Look at the human body. We have two eyes, two lungs, two kidneys, even two brains (with the possible exception of company executives) - and each has more capacity than is needed ordinarily. So redundan­cy equals insurance, and the apparent inefficiencies are associated with the costs of maintain­ing these spare parts and the energy needed to keep them around in spite of their idleness.

The exact opposite of redundancy is naive optimisation. The reason I tell people to avoid attending an (orthodox) economics class and argue that economics will fail us is the following: economics is largely based on notions of naive optimisation, mathematised (poorly) by Paul Samuelson - and these mathematics have contributed massively to the construction of an error-prone society. An economist would find it inefficient to carry two lungs and two kidneys - consider the costs involved in transporting these heavy items across the savannah. Such optimisation would, eventually, kill you, after the first accident, the first "outlier". Also, consider that if we gave Mother Nature to economists, it would dispense with individual kidneys - since we do not need them all the time, it would be more "efficient" if we sold ours and used a central kidney on a time-share basis. You could also lend your eyes at night, since you do not need them to dream.

Almost every major idea in conventional economics fails under the modification of some assumption, or what is called "perturbation", where you change one parameter or take a parameter henceforth assumed to be fixed and stable by the theory, and make it random. Take the notion of comparative advantage, supposedly discovered by David Ricardo, and which has oiled the wheels of globalisation. The idea is that countries should focus on "what they do best". So one country should specialise in wine, another in clothes, even though one of them might be better at both. But consider what would happen to the country if the price of wine fluctuated. A simple perturbation around this assumption leads one to reach the opposite conclusion to Ricardo. Mother Nature does not like overspecialisation, as it limits evolution and weakens the animals.

This explains why I found the current ideas on globalisation (such as those promoted by the journalist Thomas Friedman) too naive, and too dangerous for society - unless one takes into account the side effects. Globalisation might give the appearance of efficiency, but the operating leverage and the degrees of interaction between parts will cause small cracks in one spot to percolate through the entire system.

The debt taboo

The same idea applies to debt: it makes you very fragile under perturbations. We currently learn in business schools to engage in borrowing, against all historical traditions (all Mediterranean cultures developed over time a dogma against debt). "Felix qui nihil debet", goes the Roman proverb: "Happy is he who owes nothing." Grandmothers who survived the Great Depression would have advised doing the exact opposite of getting into debt: have several years of income in cash before any personal risk-taking. Had the banks done the same, and kept high cash reserves while taking more aggressive risks with a smaller portion of their port­folios, there would have been no crisis.

Documents dating back to the Babylonians show the ills of debt, and Near Eastern religions banned it. This tells me that one of the purposes of religious traditions has been to enforce prohibitions to protect people against their own epistemic arrogance. Why? Debt implies a strong statement about the future, and a high degree of reliance on forecasts. If you borrow $100 and invest in a project, you still owe $100 even if you fail in the project (but you do a lot better in case you succeed). So debt is dangerous if you are overconfident about the future and are Black Swan-blind - which we all tend to be. And forecasting is harmful since people (especially governments) borrow in response to a forecast (or use the forecast as a cognitive excuse to borrow). My "Scandal of Prediction" (bogus predictions that seem to be there to satisfy psychological needs) is compounded by the "Scandal of Debt": borrowing makes you more vulnerable to forecast error.

Just as Mother Nature likes redundancies, so she abhors anything that is too big. The largest land animal is the elephant, and there is a reason for that. If I went on a rampage and shot an elephant, I might be put in jail and get yelled at by my mother, but I would hardly disturb the ecology of Mother Nature. On the other hand, my point about banks in my book - that if you shot a large bank, I would "shiver at the consequences" and that "if one falls, they all fall" - was subsequently illustrated by events: one bank failure, Lehman Brothers, in September 2008, brought down the entire edifice.

The crisis of 2008 provides an illustration of the need for robustness. Over the past 2,500 years of recorded ideas, only fools and Platonists have believed in engineered utopias. We shouldn't think that we can correct mistakes and eliminate randomness from social and economic life. The challenge, rather, is to ensure that human mistakes and miscalculations remain confined, and to avoid them spreading through the system - just the way Mother Nature does it. Reducing randomness increases exposure to Black Swans.

My dream is to have a true "epistemocracy"; that is, a society robust against expert errors, forecasting errors and hubris, one that can be resistant to the incompetence of politicians, regulators, economists, central bankers, bank­ers, policy wonks and epidemiologists.Here are ten principles for a Black Swan-robust society.

What is fragile should break early while it's still small: Nothing should ever become too big to fail. Evolution in economic life helps those with the maximum amount of hidden risks become the biggest.

No socialisation of losses and privatisation of gains: Whatever may need to be bailed out should be nationalised; whatever does not need a bailout should be free, small and risk-bearing. We got ourselves into the worst of capitalism and socialism. In France, in the 1980s, the Socialists took over the banks. In the US in the 2000s, the banks took over the government. This is surreal.

People who drove a school bus blindfolded (and crashed it) should never be given a new bus: The economics establishment lost its legitimacy with the failure of the system in 2008. Find the smart people whose hands are clean to get us out of this mess.

Don't let someone making an "incentive" bonus manage a nuclear plant - or your financial risks: Odds are he would cut every corner on safety to show "profits" from these savings while claiming to be "conservative". Bonuses don't accommodate the hidden risks of blow-ups. It is the asymmetry of the bonus system that got us here. No incentives without disincentives.

Time to definancialise

Compensate complexity with simplicity: Complexity from globalisation and highly networked economic life needs to be countered by simplicity in financial products. Complex systems survive thanks to slack and redundancy, not debt and optimisation.

Do not give children sticks of dynamite, even if they come with a warning label: Complex financial products need to be banned because nobody understands them, and few are rational enough to know it. We need to protect citizens from themselves, from bankers selling them "hedging" products, and from gullible regulators who listen to economic theorists.

Only Ponzi schemes should depend on confidence: Governments should never need to "restore confidence". Cascading rumours are a product of complex systems. Governments cannot stop the rumours. We just need to be able to shrug off rumours, to be robust to them. Do not give an addict more drugs if he has withdrawal pains: Using leverage to cure the problems of too much leverage is not homoeopathy, it's denial. The debt crisis is not a temporary problem, it's a structural one. We need rehab.

Citizens should not depend on financial assets as a repository of value and rely on fallible "expert" advice for their retirement: Economic life should be definancialised. We should learn not to use markets as warehouses of value.

Make an omelette with the broken eggs: The crisis of 2008 was not a problem to fix with makeshift repairs. We will have to remake the system before it does so itself. Let us move voluntarily into a robust economy by helping what needs to be broken break on its own, converting debt into equity, marginalising the economics and business school establishments, banning leveraged buyouts, putting bankers where they belong, clawing back the bonuses of those who got us here and teaching people to navigate a world with fewer certainties. Then we will see an economic life closer to our biological environment: smaller firms and no leverage - a world in which entrepreneurs, not bankers, take the risks, and in which companies are born and die every day without making the news.

Extracted from the postscript to "The Black Swan: the Impact of the Highly Improbable" by Nassim Nicholas Taleb (Penguin, £9.99)
© Nassim Nicholas Taleb 2008

This article first appeared in the 05 July 2010 issue of the New Statesman, The cult of the generals

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The New Times: Brexit, globalisation, the crisis in Labour and the future of the left

With essays by David Miliband, Paul Mason, John Harris, Lisa Nandy, Vince Cable and more.

Once again the “new times” are associated with the ascendancy of the right. The financial crash of 2007-2008 – and the Great Recession and sovereign debt crises that were a consequence of it – were meant to have marked the end of an era of runaway “turbocapitalism”. It never came close to happening. The crash was a crisis of capitalism but not the crisis of capitalism. As Lenin observed, there is “no such thing as an absolutely hopeless situation” for capitalism, and so we discovered again. Instead, the greatest burden of the period of fiscal retrenchment that followed the crash was carried by the poorest in society, those most directly affected by austerity, and this in turn has contributed to a deepening distrust of elites and a wider crisis of governance.

Where are we now and in which direction are we heading?

Some of the contributors to this special issue believe that we have reached the end of the “neoliberal” era. I am more sceptical. In any event, the end of neoliberalism, however you define it, will not lead to a social-democratic revival: it looks as if, in many Western countries, we are entering an age in which centre-left parties cannot form ruling majorities, having leaked support to nationalists, populists and more radical alternatives.

Certainly the British Labour Party, riven by a war between its parliamentary representatives and much of its membership, is in a critical condition. At the same time, Jeremy Corbyn’s leadership has inspired a remarkable re-engagement with left-wing politics, even as his party slumps in the polls. His own views may seem frozen in time, but hundreds of thousands of people, many of them young graduates, have responded to his anti-austerity rhetoric, his candour and his shambolic, unspun style.

The EU referendum, in which as much as one-third of Labour supporters voted for Brexit, exposed another chasm in Labour – this time between educated metropolitan liberals and the more socially conservative white working class on whose loyalty the party has long depended. This no longer looks like a viable election-winning coalition, especially after the collapse of Labour in Scotland and the concomitant rise of nationalism in England.

In Marxism Today’s “New Times” issue of October 1988, Stuart Hall wrote: “The left seems not just displaced by Thatcherism, but disabled, flattened, becalmed by the very prospect of change; afraid of rooting itself in ‘the new’ and unable to make the leap of imagination required to engage the future.” Something similar could be said of the left today as it confronts Brexit, the disunities within the United Kingdom, and, in Theresa May, a prime minister who has indicated that she might be prepared to break with the orthodoxies of the past three decades.

The Labour leadership contest between Corbyn and Owen Smith was largely an exercise in nostalgia, both candidates seeking to revive policies that defined an era of mass production and working-class solidarity when Labour was strong. On matters such as immigration, digital disruption, the new gig economy or the power of networks, they had little to say. They proposed a politics of opposition – against austerity, against grammar schools. But what were they for? Neither man seemed capable of embracing the “leading edge of change” or of making the imaginative leap necessary to engage the future.

So is there a politics of the left that will allow us to ride with the currents of these turbulent “new times” and thus shape rather than be flattened by them? Over the next 34 pages 18 writers, offering many perspectives, attempt to answer this and related questions as they analyse the forces shaping a world in which power is shifting to the East, wars rage unchecked in the Middle East, refugees drown en masse in the Mediterranean, technology is outstripping our capacity to understand it, and globalisation begins to fragment.

— Jason Cowley, Editor 

Tom Kibasi on what the left fails to see

Philip Collins on why it's time for Labour to end its crisis

John Harris on why Labour is losing its heartland

Lisa Nandy on how Labour has been halted and hollowed out

David Runciman on networks and the digital revolution

John Gray on why the right, not the left, has grasped the new times

Mariana Mazzucato on why it's time for progressives to rethink capitalism

Robert Ford on why the left must reckon with the anger of those left behind

Ros Wynne-Jones on the people who need a Labour government most

Gary Gerstle on Corbyn, Sanders and the populist surge

Nick Pearce on why the left is haunted by the ghosts of the 1930s

Paul Mason on why the left must be ready to cause a commotion

Neal Lawson on what the new, 21st-century left needs now

Charles Leadbeater explains why we are all existentialists now

John Bew mourns the lost left

Marc Stears on why democracy is a long, hard, slow business

Vince Cable on how a financial crisis empowered the right

David Miliband on why the left needs to move forward, not back

This article first appeared in the 22 September 2016 issue of the New Statesman, The New Times