There are two ways of speaking about the future. One is conjecture; that we sit down and imagine what tomorrow will bring. The other is to look at the data which scientists, from the study of decades of trends and figures, have laid before us.
What follows in this chapter is of the second kind: not a dream, but the documented projections of reputable world institutions concerning the century upon which we have set foot.
And the wonder is that when I set these projections side by side, a picture appears in which humanity’s need for something like the Global Rail Network seems not an agreeable choice but a structural necessity.
Let us examine this picture, piece by piece.
First: ten billion human beings, and a peak that will never be repeated
The United Nations, in its most recent estimates, says that the population of the world will rise from about eight and a half billion today to its peak in the middle of the century, by the 2080s — close to ten and a half billion — and will then slowly begin to decline. That is to say, humanity in this very century adds more than two billion further human beings; and researchers say that this “next two billion” is in all likelihood the last two billion to be added to the population of the earth.
But the decisive point is not the number; it is its location. The greater part of this growth takes place in the poorest and least provided regions of the world — particularly in sub-Saharan Africa and southern Asia; the very places which today have the least access to roads, markets, medicine and education. At the same time, many wealthy countries are ageing and declining in population, and their workforce is dwindling.
So the picture of the coming century is this: a world with, on one side, a great mass of capable young people without roads and without opportunity, and on the other, aged lands with abundant infrastructure but a diminishing workforce. If there is no bridge between the two, this imbalance turns into pressure, disordered migration and tension. And if there is a bridge — a road that carries opportunity to that young person and his capacity to the world — then this very balancing becomes one of the greatest engines of flourishing in history.
Second: a world that is migrating to the city
The second certain truth is urbanisation. Today about half the people of the world live in cities; by the year 2050 this proportion reaches about sixty-eight per cent, and by the end of the century close to eighty-five per cent — that is, nearly nine billion city dwellers, against fewer than one billion in the year 1950. India, China and Nigeria alone will have hundreds of millions of new city dwellers by the middle of the century.
This great migration has two faces. Its dark face is that if people pour only towards a few swollen megacities, those cities bend beneath the weight of shanty settlement, pollution and the failure of services. But its bright face is that if this flow can be spread over a wider expanse — towards dozens of medium and newly founded cities rather than a few giants — then urbanisation leads to flourishing rather than to disorder.
And this is precisely what a continent-wide rail network does. The railway, throughout its history, has built cities; every station is the nucleus of a settlement. A network passing through the heart of the continents turns dozens and hundreds of new points into centres of life and lifts the pressure from the shoulders of the megacities. Instead of everyone running towards one point, opportunity goes out towards everyone.
Third: water and bread for ten billion
The third challenge may be the heaviest of all. Estimates say that global demand for water will rise by about fifty-five per cent between the years 2000 and 2050. Today more than two billion people live in countries facing high water stress, and close to four billion experience severe water shortage for at least one month of the year. Alongside this, global demand for food rises sharply by the middle of the century, and the change of climate makes agriculture less stable in many regions.
But here is a truth less often spoken: the world, taken as a whole, produces enough food. The chief problem, more than production, is distribution. A great part of the agricultural crop is lost upon the road before it reaches the table — for want of roads, for want of a cold chain, and through the slowness of transport. At the same time, regions suffering drought wait for aid that arrives late or never arrives at all.
The Global Rail Network fills precisely this gap. Upon many long routes and for the bulk carriage of grain and food and water, the railway is among the most efficient land options; it can bring a crop from a remote farm to a market on the other side of a continent within a few days, and on the day of famine can pour aid into a stricken region with a speed and on a scale that no road convoy could manage. In a world where food and water grow scarcer, the speed and cheapness of delivery will be as vital as production itself.
Fourth: hundreds of millions of people in motion
The fourth truth is the bitterest. The World Bank estimates that by the year 2050, in six regions of the world alone, up to about two hundred and sixteen million people will be obliged, because of the gradual effects of climate change — water shortage, falling crops and the rising of the sea — to move within their own countries. The share of sub-Saharan Africa is estimated at about eighty-six million, East Asia forty-nine million, South Asia forty million, and North Africa nineteen million. The first centres of this migration become apparent from about the year 2030.
But that same report has a hopeful point as well: this figure is not fixed. With timely action and inclusive, resilient development, as much as eighty per cent of this otherwise inevitable displacement can be reduced. And experts emphasise that migration is not in itself a catastrophe; what turns it into one is the absence of planning. If the destinations are prepared in advance — with housing, transport infrastructure, services and the opportunity of work — that same displacement can become a capital for growth.
And here the role of the network is twofold. On the one hand, by carrying water and food and work and services to regions at risk, it releases many from the necessity of migrating — for people generally leave only when staying has become impossible. And on the other, for those who must go, it makes a dignified, safe and orderly movement possible, instead of deadly and disordered journeys. In a century in which hundreds of millions of people will be in motion, the having or not having of a fitting road is the boundary between order and chaos.
Fifth: a gap that will either be filled or will burst
And finally, the same challenge of which I spoke in the earlier parts: inequality. If population growth occurs in the poorest regions while wealth and technology remain concentrated in the richest, the gap will not only fail to close but will deepen through the course of this century. And a gap that deepens breaks open, sooner or later, in the form of unrest, extremism and war.
What the network does is simple but fundamental: it carries opportunity to a place where until now it has not gone. A country that has no road has no market; and a country that has no market has no future. By joining deprived lands to the artery of the world economy, it brings them from the margin into the text. And this is the most effective policy against inequality — because instead of alms, it gives the possibility of working and of building.
The whole picture: a civilisation in need of a new foundation
If we set these five trends side by side — a population reaching its historic peak and growing in an unbalanced place, a world migrating to the city, water and food growing scarcer, hundreds of millions of people who will be in motion, and a gap growing more dangerous by the day — the conclusion is plain: human civilisation in this century needs a new foundation for the flow of people and goods and opportunity. A foundation of great capacity, clean, reaching into the heart of the landmass, and not dependent upon a few fragile chokepoints.
And the wonder is that the description of that foundation is exactly the description of the Global Rail Network. This is not an answer carved out for a manufactured problem; it is an answer which the problems themselves demand.
What we shall have in the year 2100
So let us look at the end of this century, this time not with the question “what if it does not exist”, but with the question “what shall we have if it does”.
In the year 2100, ten billion human beings live upon this earth — but not in a world torn in two; in a world joined together. A young person born in the heart of Africa has the same access to education and medicine and market as his counterpart in the heart of Europe. New cities that have grown along the lines have lifted the pressure from the shoulders of the swollen megacities. Grain and water reach every corner within a few days on the day of need, and famine — which was for centuries the scourge of mankind — has largely passed away. Someone obliged to migrate is moved by a dignified and safe train, and not by a broken boat in the middle of the sea.
And most important of all, nations which until yesterday knew one another only from behind news reports and prejudice now meet one another millions of times a day in the stations and the carriages, and discover that this “other” is a human being like themselves.
And behind all of this there runs a culture which this network has brought with it: mutual respect, wellbeing, cleanness of the environment, and human dignity. A civilisation born not out of conquest and mastery, but out of connection and cooperation.
And this is no longer a choice
The conclusion that emerges from this chapter may seem severe, but it is honest: with what the scientists have foretold of this century, the building of such a network is no longer a beautiful wish or an ambitious scheme; it is one of the preconditions of the dignified survival of mankind in the century ahead. A world of ten billion people, limited resources and an unstable climate will not remain stable without a foundation for connection and for just distribution.
The generations to come will ask us one question: you who knew what was coming — what did you do? And the answer depends upon a decision that lies, this very day, in our hands.
Sources and references: United Nations, World Population Prospects (2024 revision); United Nations, World Urbanization Prospects; the United Nations World Water Development Report; World Bank, Groundswell report (2021); research in Population and Development Review (2025); data of the Food and Agriculture Organisation of the United Nations (FAO).