Rich and Poor Are Becoming Different Species

Inequality is usually discussed as a matter of degree: some people have more, some have less, and the argument is about how much spread is tolerable. I want to describe two areas where the difference is turning into a difference of kind, and where the endpoint is not a wider gap but a divergence.

Nationality Has Become Optional for the Rich

For most people, nationality is a fact about them, assigned at birth and largely immutable. It determines where they may live, work, and travel, and no amount of preference changes it.

For the wealthy it has become a purchasable service. Almost every developed country now sells residence or citizenship in exchange for local investment — a property purchase, a business, a government bond, a straightforward donation. With enough money you are a citizen of the world rather than of any particular state, free to relocate at will.

The market dynamics that follow are worth noticing. Because states compete for wealthy residents, they bid: lower tax rates, faster naturalisation, assistance with schooling, health provision, favourable treatment of foreign income. The competition is real and the terms improve for the buyer over time.

None of it is offered to someone without money. The same states compete against poor migrants with fences and detention.

So the same physical act — crossing a border to live somewhere better — is a service industry at one end of the wealth distribution and a criminal matter at the other. That is not a difference of degree.

Medicine Is the Sharper Case

There are no good statistics on this, which is itself telling, but it is likely that the wealthy have been consuming preventive and life-extending medicine for half a century or more: early cancer screening, continuous monitoring, specialist access without queueing, and the interventions that never reach a public formulary.

Add the surrounding apparatus. Personal trainers and dietary consultants steer them away from the food that constitutes one of the poor's worst health problems. Life expectancy for the rich should therefore be significantly higher, and as far as anyone can measure, it is.

Some gap has always existed. Five hundred years ago the wealthy avoided hazardous work and ate better. But that gap narrowed through the twentieth century, as ordinary people gained access to decent food, sanitation, and antibiotics. The trend was convergence.

Why This Time Is Different

What is changing is the kind of medicine.

Historically, medical advances reached the rich first and diffused to everyone, because they were treatments for disease. A cure is a discrete thing: once discovered, it can be manufactured cheaply, and its value does not depend on scarcity. Penicillin reached everyone.

What is arriving now is different in kind: gene therapy, organ replacement, cellular repair — interventions whose purpose is not to cure an illness but to extend the healthy lifespan of a well person. These may diffuse in the same way. Or they may not, because they are ongoing rather than one-off, individually tailored rather than mass-manufactured, and expensive in ways that do not fall with scale.

If they do not diffuse, the result is a two-class society in a sense we have no precedent for: those who can afford them and those who cannot.

Why the Old Solvent Has Weakened

Historically, rich and poor were bound together by shared vulnerability. Plague did not check bank balances. Both classes lived in the same city, breathed the same air, and buried children.

That common exposure is what made the medical gap narrow rather than widen — the wealthy had a personal stake in public health, because public health was also their health.

Much of that binding has dissolved. Not entirely, as a recent pandemic reminded everyone, but substantially. And with life-extension the divergence is self-reinforcing: the group that benefits first accumulates more of the resources that purchase the next round.

The Endpoint

Consider a world containing people who live to two hundred and people who live to eighty.

That is not a difference of class. Classes intermarry, share a culture, and hold overlapping interests. Groups with a two-and-a-half-fold difference in lifespan do not: they have different time horizons, different relationships to risk, different attitudes to the future, and different conceptions of what a life is.

It is closer to a difference of species. I am not saying it will happen — the diffusion may work as it always has. I am saying the mechanism that previously guaranteed diffusion has weakened, and nobody is watching the thing that would tell us which way it goes.