One map, two walls

One · The perimeter

Deutinger's number was right

Walled World was published by TD Architects out of Amsterdam and Salzburg, ran in Vrij Nederland in 2006, the Rotterdam Biennale catalogue in 2007 and domus 927 in 2009. It is an America-centred world map with every separation wall, fence and border-surveillance line on it, and one claim across the bottom: 14% of the world's population generates 73% of global income.

That figure is checkable, and it checks out. In 2009 the World Bank's high-income group held 74.2% of world gross national income. Deutinger was inside a point and a half of the ledger.

What he did with it was argue that the fall of one wall in 1989 was followed immediately by the construction of better ones — Schengen's 1995 perimeter sitting, in his phrase, "80km offset to the east of Berlin" — and that the rich world was by then building, across all five inhabitable continents, the largest barrier in human history in order to keep its income inside.

Share of world GNI held by the World Bank high-income group, current US dollars, series NY.GNP.MKTP.CD. The high-income group is the closest published stand-in for the zone Deutinger drew inside his perimeter; it is wider than his line, which is why his population figure of 14% sits below the group's 19.1% for the same year.

Two · The ceiling

This index measures the other wall

The Biometric Enforcement Index scores 195 jurisdictions on one question: how far can this state reach to enforce a biometric phone-identity rule against the person living in it. Ten is a towering wall. One is open ground. The wall is not a perimeter — it runs between a government and its own residents, and every country has one.

Sorted into its five bands and weighed against population and income, the index does something Deutinger's map did not set out to do. It reproduces his income figure.

The top band — 45 countries at wall height 9 or 10 — holds 75.7% of world income. Deutinger said 73%. It also holds 35.7% of world population, which is two and a half times his 14%, and that gap is the whole finding.

Three · The overlay

The same shape, twice

Three views of one map. The perimeter is the rich world Deutinger drew his line around. The ceiling is this index's top band. Both is what happens when you put one over the other.

Cross the two walls and the world falls into four boxes. The diagonal is the answer.

The box where both walls stand is 34 countries holding 13.8% of world population and 56.2% of world income. Seventeen years after Deutinger drew it, his population band is still there, intact, to within two-tenths of a point. What changed is what identifies it. In 2009 you found those people by looking for the perimeter. Today you find them by looking for the ceiling.

Four · The divergence

The gap is one country

Eleven countries sit in the top enforcement band without high income: China, Turkey, Iran, Vietnam, Kazakhstan, Azerbaijan, Belarus, Turkmenistan, Cuba, Eritrea and North Korea. Together they hold 21.9% of world population and 19.5% of world income — by population, a larger bloc than the entire walled-in rich world.

Then look at the composition. China alone is 17.0% of world income and 17.4% of world population. The other ten together are 2.5% of income and 4.5% of population. Strip China out of the top band and it falls to 18.3% of population and 58.7% of income — which is, within rounding, Deutinger's perimeter again.

So the honest statement is narrow and it is sharper for being narrow. The enforcement wall has left the rich world exactly once, and the country it left for is China. Everything else in that band is small.

Five · The slide

The walls outlived the income

Run the ledger forward from the year the Berlin Wall came down and the sequence is plain. The wall falls in 1989. The rich world's share of world income peaks three years later, in 1992, at 86.6%. Then it slides for thirty-two years while the new walls go up.

High-income group share of world GNI, current US dollars, 1990–2024. World Bank series NY.GNP.MKTP.CD.

Deutinger published at 74.2%, on the steepest part of the fall. By 2024 it is 64.9% — down 9.4 percentage points since he drew the map, and 21.8 points off the 1992 peak. Over the same span the walled-in population share barely moved: 19.1% in 2009, 17.4% in 2024.

That is the finding the overlay produces. Walled World argued the West was building the greatest wall ever built in order to hold its income behind it. The ledger says the income left anyway — nine points of it — and the wall stayed, and the technology that makes a wall work got exported to a state with none of the income. The barrier and the wealth it was built around have come apart.

Six · The audit

What this does to the index

Putting BEI-v1 beside a published figure exposes two things about BEI-v1, and both belong here rather than in someone else's rebuttal.

The ranking is half-explained by income

Against World Bank income tier the index's ordering has a Spearman rank correlation of ρ = 0.715 across all 195 jurisdictions — about 51% of the variance. Mean index position is 52nd for high-income countries and 154th for low-income ones. That is not a defect; it is the argument, and it is the reason the overlay works at all. But an undeclared correlation of that size is an invitation, so it is declared: this index is already a redraw of Walled World, and the thing it adds is the eleven-country divergence in box two, not the diagonal.

"195 jurisdictions" is 176 positions in 10 bands

The underlying ordinal list carries 19 duplicated positions and 19 missing ones — the whole block from 11 to 21 is vacant. That leaves 176 distinct positions resolving to 10 published wall heights. Nothing visible is wrong today, because every collision and every gap falls inside a single band and the raw position is never shown. It is a latent fault, not a live one: the first country inserted near a band boundary will move a displayed score without anybody touching that country.

What would falsify the overlay

• If the top enforcement band's income share diverged from the high-income group's by more than a few points, the diagonal would be coincidence. It does not: 75.7% against 64.9% for the group, and 56.2% for the intersection — one nested inside the other.
• If stripping China left the band unchanged, the divergence claim would be wrong. It does not: the band loses 17.4 points of population and 17.0 points of income with one row removed.
• If the high-income income share had held near 73% through 2024, the "walls outlived the income" claim would be dead. It did not hold; it fell 9.4 points.

Coverage and gaps

Population and income are 2024 values for 195 jurisdictions, totalling 8.10 billion people and $109.2 trillion GNI. 7 jurisdictions publish no GNI figure — Cuba, Eritrea, Monaco, North Korea, South Sudan, Vatican City and Yemen — and are counted in population but not income; North Korea sits at wall height 10, so the top band's income share is if anything understated. Vatican City has no population figure. 21 jurisdictions are too small to draw at this projection and carry no colour on the map above; they are 0.13% of population and 0.09% of income between them, and all 195 are in the table.

Canada

Position 60, wall height 8 — inside Deutinger's perimeter and below this index's own top band, under Hungary and Oman. Rich, walled in, and not among the states that can reach furthest into a phone.