So where do we go from here? If the past 100 years are a guide, we can be reasonably confident in our ability to achieve astounding progress once again. Add to this a clear understanding of what did not work in the past and we gain the ability to deliver on the promise to our grandchildren.
Power to change course
Here are two scenarios for the next 100 years, developed by IMF staff. In what we might call the “low-ambition scenario,” global GDP would be about three times larger and global living standards twice as high as they are today. In the “high-ambition scenario,” global GDP would be 13 times larger, and living standards would be 9 times higher.
Why the huge difference? The low-ambition scenario is based on the lower-growth experience of living standards in the 100 years before 1920, while the other is based on the much higher average growth rates from 1920 until now. I believe our grandchildren will enjoy the better of the two.
To get there, we will need a continued commitment to placing our economy on sound fundamentals—from price stability to sustainable public debt levels and financial stability—as well as to opening trade and entrepreneurship to boost growth and jobs. But this will not be enough. We will need better international cooperation and a different kind of growth—more sustainable and equitable. IMF research shows that lower income inequality can be associated with higher and more durable growth.
And we must use capital accumulation more wisely. My grandchildren’s prospects will hinge on whether we can allocate capital to where it is needed most and will have the greatest positive impact. So where should capital go? Let me highlight three priority areas of investment.
First, the climate economy: Today climate shocks are hitting economies everywhere—from droughts, wildfires, and floods to less visible impacts in areas such as supply chains and insurance markets. Pessimists say humanity faces a disastrous reckoning. But I see a different picture: if we act decisively, especially in this decade, we can reach a carbon-neutral economy and help ensure a livable planet. We must promise to do so.
It will mean mobilizing trillions of dollars in climate investments—for mitigation, adaptation, and transition. And it will mean addressing the terrible market failure that has polluters damaging our planet free of charge. Our research shows that pricing carbon is the most efficient way to accelerate decarbonization.
We have a long way to go—the average price per ton of carbon dioxide emissions today is only $5, way below the $80 we need to reach by 2030. But there is progress: carbon pricing programs now cover a quarter of global emissions, which represents a doubling since 2015. And investors are responding: for every $1 spent on fossil fuels, $1.70 is now spent on clean energy—compared with a ratio of 1:1 five years ago.
More climate investment could create millions of green jobs, increase innovation, and accelerate green technology transfer to developing economies. It could break the historical link between growth and emissions—such that, as countries get richer, people enjoy better living standards without hurting our planet.
Second, investment in the next industrial revolution: from quantum computing to nanotechnology, from nuclear fusion to virtual reality, from new vaccines to gene therapy. Innovation is accelerating, transforming how we live and work.
Take artificial intelligence. It could turbocharge productivity and growth everywhere. And I am especially struck by its potential to shrink gaps in human capital in the developing world, helping income levels catch up with those in advanced economies.
But it also comes with risks. IMF research shows that, in advanced economies, about 60 percent of jobs could be affected by AI. Half of them may see benefits from AI tools, but the other half may simply be rendered obsolete. This could drive unemployment up and wages down—Keynes himself warned of this when he wrote about “technological unemployment.”
Clearly, we need to ensure that AI serves humanity. Instead of deepfakes and disinformation, we want scientific, medical, and productivity breakthroughs. We want AI to reduce inequality, not increase it.
Countries must start preparing now by scaling up investment in digital infrastructure and expanding access to retraining and reskilling. We also need global principles for the responsible use of AI—guardrails—to minimize the risks and maximize the opportunities for everyone.
Third, investment in people: The greatest dividends are paid here—by investing in health and education and stronger social safety nets and by empowering women economically. This lies at the heart of better and fairer capital accumulation.
Nowhere is this clearer than in Africa—home to the youngest and fastest-growing populations. By the end of this century, Africa’s share of the global population is set to reach close to 40 percent. At the opposite end of the spectrum are regions such as Europe and East Asia, where populations are rapidly aging, and some are even shrinking.
How can we better connect Africa’s abundant human resources with the abundant capital in advanced economies and major emerging markets? For African countries, the key is to attract long-term investors and ensure stable trade flows. This will mean promoting better growth: from improving the business environment to raising more revenue and weeding out inefficient spending. For countries that are already facing strained budgets and high debt, this would create more room for vital social spending.
Just one example from IMF research: by building tax capacity, low-income countries could boost their annual budget revenues by up to 9 percent of GDP—a big increase that would bring their tax effort in line with that of emerging market economies.
If the right kind of international support can be combined with the right kind of domestic policies, we could see Africa attracting long-term flows of investment, technology, and know-how. This could unlock the full potential of its young people.
It would mean more jobs in and less outward migration from Africa; higher returns on capital that could be used in advanced economies, including to make their pension systems more sustainable; and overall, a more dynamic global economy. In short, a prosperous world in the coming century requires a prosperous Africa.
Investment in these three key areas—climate, technology, and people—is critical. But again, we cannot do it without international cooperation.
Twenty-first century multilateralism
As one of the founding fathers of the IMF and the World Bank, Keynes helped the world draw the right lessons from the Great Depression and World War II. Instead of inward-looking policies that can lead to crises and conflict, countries should rely on a new framework for international cooperation. That vision became reality—a “multilateralism for the 20th century,” which served us well.