Touching the Void
There are some simple moments in human history that change everything.
At the time they seem innocuous, innocent even. But these moments are made of different stuff. Their boiling point is higher, and they don’t evaporate into the into the steam of human history. Far from it, their energy deflects the pattern of evolution and everything that happens thereafter is infused with their significance. The impact of such moments can often only be truly appreciated a hundred years or more, later.
One such moment was the emergence of the concept of zero.
It’s hard to imagine a world where zero did not exist. The romans never had a zero. No senator ever went to the market and bought zero sheep. The wanted four (IV), eleven (XI) or maybe even a hundred (C).
But the emergence of zero changed everything.
Who in your leadership team, or your advisors, can do that for you.
Revolutionary ideas never appear in a vacuum. Long before the idea of zero emerged, as a number, in India in 628, the Babylonians touched the void. They left a gap, and later, by about 300 BC a pair of wedges, to mark an empty column. The Mayans, entirely independently, developed a zero for their calendars in the 4th century. But such placeholders are just punctuation. What India gave the world was the actual number zero: something you could add, subtract and multiply.
Nothing Came from India
It was the Indian astronomer Brahmagupta who first set out the rules for calculating with zero. And once we had zero, we also had negative numbers. It was not by chance that nothing came from India. Indian philosophy had been comfortable with emptiness for centuries. The Sanskrit word for zero, śūnya, means void, and the Buddhist philosopher Nāgārjuna had built an entire school of thought around śūnyatā, or emptiness, four centuries earlier. It’s hardly surprising then, that a civilisation that contemplates nothing as something was best placed to write it down.
In contrast, the Greeks despite being brilliant geometers were deeply suspicious of the void. Aristotle argued that nature abhors a vacuum, and for the best part of two thousand years much of Western thought agreed with him. Brilliance, it turns out, is no guarantee that you’ll see the idea you most need.
The Persian Who Took Nothing Global
But ideas don't change the world when they're invented. They change it when they spread.
Around 825, Muḥammad ibn Mūsā al-Khwārizmī, a Persian scholar working in Baghdad's House of Wisdom, wrote a paper on calculating with the Hindu numerals. It became the Persian carpet that carried zero westward. When his name was translated into Latin it became Algoritmi, which is the origin of the word algorithm. His other great work gave us the word algebra.
Every time your CIO mentions "the algorithm", they’re paying unwitting tribute to a ninth-century Persian. The Hindu word Śūnya travelled on the Persian carpet too but as Arabic ṣifr, which in Latin became zephirum, then in Italian zero. On its journey it also gave birth to the word cipher, which means both "nothing" and "secret code". That double meaning reveals a lot about the suspicion with which the West first viewed the idea.
Fibonacci Advocates for More than Nothing
Europe remained very wary of zero for centuries. Its response was stereotypical and exactly what you'd expect from a large incumbent faced with a disruptive technology: suspicion, resistance and regulation.
But eventually medieval Europe’s greatest mathematician, Leonardo of Pisa, better known as Fibonacci, promoted Hindu-Arabic numerals to merchants in his Liber Abaci in 1202. Despite this, in 1299 Florence's bankers' guild prohibited zero in account books, partly because a 0 could so easily be doctored into a 6 or a 9. Roman numerals clung on in official ledgers in Europe for centuries.
It wasn’t until 1494, when the Franciscan friar Luca Pacioli published the first printed account of double-entry bookkeeping, that zero's commercial power was fully unleashed. Debits and credits, balancing to zero. The Medici, the joint-stock company, the bond market, the modern bank: all of them run on the idea that a column can go below nothing and still make sense.
How Zero Turned Debt into a Financial Metric
The concept of debt is far older than the idea of zero. Sumerian clay tablets from around 3000 BC record loans of barley and silver, with interest. Some anthropologist argue that credit systems came before coins, not after. Mesopotamian kings periodically declared debt amnesties, literally wiping the tablets clean, because they understood something we seem to have forgotten, namely unchecked debt destroys societies.
So even though zero wasn’t the parent of debt it did something subtler and more important, it turned debt from a relationship into a number.
The day before zero emerged, a debt was something one person owed another. It had a face, a family, a village. It could be forgiven. Once we got zero, debt could sit quietly below the line as a negative quantity: abstract, divisible, tradable, compoundable and, crucially, impersonal. You can sell a number. You can bundle it, securitise it and pass it to someone who will never meet the person who owes it. You can’t do that with a relationship.
The ability to abstract zero changed the world. It has been one of humanity's greatest engines of growth. But it’s also been one of the sources of our greatest suffering.
According to the Institute of International Finance, global debt passed $365 trillion in the first half of 2026, around 310% of global GDP. Advanced economies now pay more in interest on their internationally traded government bonds than the world spends on defense.
Zero has transformed our lives. On the day before zero, you couldn't do long division on a scrap of paper. You couldn't express the idea of having less than nothing. There was no calculus, no binary code, no spreadsheet, no balance sheet as we know it, and certainly no large language model quietly drafting our board papers. The entire scaffolding of the modern economy rests on a small oval that means, literally, nothing.
And strangely on the day before zero, nobody felt anything was missing. Merchants traded, empires taxed, engineers built aqueducts that still stand. The absence of zero, of nothing, was invisible precisely because it was an absence. You can't miss a concept you don't have.
So What?
Here’s the moral of the story. Zero isn't about mathematics. It's about human development.
As we mature as adults, we develop the ability to move from subject to object (S2O). We move from being unable to see what’s embedded in our thinking to being able to take a step back and objectify something we previously couldn’t see.
The Greeks’ subjective worldview had no room for a void. They couldn't see the number that would have transformed their mathematics. Florence's bankers were subject to their fear of fraud. They banned the most powerful financial tool ever devised.
Neither group was stupid. Both were operating from a level of development that didn’t have space for what came next.
The same is true of leaders and organisations today. The most important things missing from your dashboard aren't missing because you've decided they don't matter. They're missing because your current way of seeing has no column for them. Just because you are not measuring something doesn’t mean it’s not the most important metric in your entire business.
For example, few organisations track the hidden human cost of restructuring; the lost opportunity cost of the strategic initiative you didn't pursue; the relational debt quietly compounding between your executive team and the people who actually do the work.
Every inflection point in human history looks obvious in hindsight, and invisible on the day before it happens.
The question worth asking in your next leadership meeting isn't "what are we missing?" You can't answer that from where you're standing. You don’t know what you don’t know.
The question you should be asking yourself is: who can see what we, on the Exec team, can’t?