How to Spend $75 Billion to Make the World a Better Place
Smartest solutions for $75 billion
Description
In 2004, in a conference center in Copenhagen, a small group of economists sat down with a deliberately provocative task. Imagine you have a large but finite sum of money to spend on the world's biggest problems — hunger, disease, climate change, war, dirty water. You cannot do everything. So what do you fund first? The exercise, run by the Danish academic Bjørn Lomborg, became the Copenhagen Consensus, and it kept returning over the following years, each time with fresh research and a larger imaginary budget. By the edition this book draws on, the figure had grown to $75 billion spread over four years.
The setup sounds abstract, almost like a parlor game. It is not. The world really does spend limited money on development, and it really does spend it unevenly — often on the causes that photograph well or make headlines rather than on the ones that quietly save the most lives per dollar. Lomborg's wager is that if you force the smartest people in the field to put a price and a payoff on each intervention, and then rank them against one another, the ranking will look nothing like the one our instincts produce. Some celebrated causes sink. Some unglamorous ones rise to the top.
What makes the book more than a spreadsheet is the discomfort it courts. Ranking suffering feels cold. Saying that one child's problem should wait while another's is solved feels like something no decent person should do. Lomborg's answer is that we already make that choice every day by default — we just do it without looking. The book insists on looking.
The question we’re asking : If you had a fixed pot of money and every good cause competing for it, how would you decide what to fund first — and would your instincts get it right?What we’ll see : How more than sixty economists, four of them Nobel laureates, tried to price the world's problems and rank the fixes, and what their answers reveal about the way we usually choose.
Table of contents
01Chapter 1 — A room full of economists ranking the world's pain
The method behind the book is almost stubbornly simple. Take twelve of the largest challenges facing humanity — malnutrition, disease, poor education, climate change, armed conflict, lack of clean water and sanitation, and so on. For each, commission a specialist to write up the most promising solutions, and crucially, to attach two numbers to every one: what it would cost, and what good it would do, both expressed in comparable terms. Then hand the whole stack to a panel of eminent economists and ask them to rank the solutions from best to worst use of money.
The people doing the ranking were not lightweights. The panels assembled for the Copenhagen Consensus included several Nobel laureates in economics, alongside more than sixty researchers who produced the underlying papers. Lomborg's role was less to supply the answers than to force the question into a shape that could actually be answered. That shape is a list — not a manifesto, not a plea, but an ordered list where everything competes against everything else for the same dollars.
02Chapter 2 — The arithmetic of doing the most good
The engine under the hood is cost-benefit analysis, and Lomborg is unapologetic about it. For every proposed solution, the researchers estimate what a dollar spent returns in benefit — lives saved, illness avoided, extra years of schooling, higher future earnings. The result is a ratio. A program that returns thirty dollars of measurable good for every dollar spent beats one that returns three, and the ranking follows the ratios down the page. It is the logic a careful investor would use, applied to human welfare instead of a portfolio.
The tool has obvious critics, and the book does not pretend otherwise. Putting a monetary value on a child's life, or on a year free of malaria, strikes many people as grotesque. Lomborg's reply is that the alternative is not to avoid the valuation — it is to make it silently and badly. Money moves toward some causes and away from others whether or not anyone admits to weighing them. Doing the sums openly at least lets the weighing be examined, argued with, and improved. The number is not the truth; it is a way of arguing that can be checked.
03Chapter 3 — When the cheapest fix wins
The interventions that climb to the top of the list share a family resemblance: they are cheap, they work fast, and they target the poorest people, where each dollar stretches furthest. Fighting malnutrition is the recurring winner. Supplying young children with micronutrients — vitamin A, zinc, iron, iodine — costs very little per child and pays back extraordinarily, because a child who is not stunted grows into a healthier, more productive adult. The numbers here are among the most lopsided in the whole book: a few dollars in, many tens of dollars of lifelong benefit out.
Disease control clusters near the top for the same reason. Expanding malaria treatment and prevention, tackling tuberculosis, deworming schoolchildren — these are unglamorous, decades-old interventions with well-understood costs and large, near-certain returns. So is investing in the routine machinery of trade and better agricultural research, which raises incomes broadly rather than treating one symptom at a time. The pattern is that the most productive dollars rarely go to the causes that dominate the news; they go to the quiet, well-tested fixes that do not make for dramatic appeals.
04Chapter 4 — The uncomfortable politics of a ranked list
Step back from the individual rankings and the deeper claim of the book comes into view: our generosity is not steered by where it does the most good. It is steered by attention, emotion, and story. We give to the disaster on the screen, the cause with the compelling face, the problem that feels urgent this week. None of that tracks the humble arithmetic of dollars-in, good-out. The Copenhagen Consensus is, at bottom, an argument that the gap between what moves us and what helps most is large, measurable, and paid for by the people the money was supposed to reach.
That is why a ranked list feels so transgressive. It converts an implicit choice we prefer not to see into an explicit one we cannot avoid. To say that micronutrients should come before an expensive climate program is not to say climate does not matter; it is to say that on this budget, in this window, this dollar helps more here. But we experience the sentence as a betrayal, because we are used to treating every worthy cause as beyond comparison. The book's quiet insistence is that refusing to compare does not protect anyone — it just hides the losers of a comparison we are making anyway.
05Conclusion
Back in that Copenhagen conference room, the task was never really to spend $75 billion, because no one in the room controlled a cent of it. The budget was a device — a way to force scarcity into a conversation that usually pretends it away. By capping the money and making every cause compete, the exercise did something advocacy almost never does: it turned separate pleas for help into a single, honest question about where the next dollar does the most work. The answers, from malnutrition at the top to expensive near-term climate spending far below, are less important than the discipline that produced them.
