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. Last Updated: 07/27/2016

How to Build a More Equitable World

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The notion of a divide between the rich North and the poor South has long been a central concept among economists and policymakers. From 1950 to 1980, the North accounted for almost 80 percent of global gross domestic product but only 22 percent of its population.

But the North-South divide is now obsolete. The dynamic process of globalization has resulted in unprecedented levels of growth and interdependence. While this has blurred the old division, new ones have emerged, splintering today's world into four interconnected tiers.

The first tier comprises the affluent countries, notably the United States, Europe, Australia and Japan, with a combined population of around one billion and per capita incomes ranging from $79,000 in Luxembourg to $16,000 in South Korea. For the past 50 years, these affluent countries have dominated the global economy, producing four-fifths of its economic output. In recent years, however, new economies have emerged that is contesting the affluent countries' economic dominance.

These emerging economies -- call them the "Globalizers" -- constitute a second tier of about 30 poor and middle-income countries, including China and India, with per capita GDP growth rates of 3.5 percent or more, and a total population of 3.2 billion, or roughly 50 percent of the world's population. These countries have experienced unprecedented levels of sustained economic growth that may well enable them to replace the "Affluents" as engines of the world economy.

A third tier is made up of roughly 50 middle-income countries with a combined population of 1.1 billion. They are also home to many of the world's critical natural resources, possessing around 60 percent of proven oil reserves. But these "Rentiers" have not been able to translate their natural resource wealth into sustained economic growth.

The fourth tier comprises countries that are lagging behind -- the world's poorest economies, with more than a billion people. They continue to stagnate or decline economically. Mostly located in sub-Saharan Africa, these "Laggards" are largely isolated from the global economy, and they face crucial development challenges.

This emerging four-tier world presents three key challenges.

First, we need to increase our efforts to ensure that the Laggards are no longer left behind. This requires policy changes as well as more generous and more effective aid. If one considers the issue of aid flows, one finds that though development aid rose in 2005 to $107 billion, most of the increase was geared towards "special circumstances," such as debt forgiveness and for Iraq and Afghanistan. The sad truth is that development aid to Africa has decreased from $49 per person in 1980 to $38 per person in 2005.

Second, the old powers need to accommodate the rise of Globalizer economies -- particularly China and India -- by reforming our international order. The Affluents will continue to be major global players, but as the Globalizers' relative economic power rises, they will demand a greater role in international affairs.

Finally, while the Globalizers have lifted millions of people out of poverty and reduced global inequality, this has not resulted in a more equal world, because star economies like India and China are experiencing a rise in domestic inequity. Whether it is coastal versus inland or rural versus urban, these countries must tackle the widening disparities, because high inequality may well threaten their very ability to continue growing as they have.

If we are to create a more equitable world, then traditional levers of development such as trade, investment, aid and migration need to be scaled up comprehensively and coherently. In addition, global institutions must be reformed. This would improve our ability to address global challenges and better our prospects for building a more equitable world. Otherwise, we might bid farewell to old development divides only to welcome new ones.

James Wolfensohn, a former president of the World Bank, is president of Wolfensohn and Company. This comment appears © Project Syndicate.