The notion of a divide between the rich north from the poor and developing south – for years a central concept in thinking about economic development – has been rendered obsolete by unprecedented levels of global growth and interdependence in the past two decades. As a result, the north-south divide has been replaced by a four-tier world with its own set of challenges.
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NEW YORK -- The notion of a divide between the rich north and the poor and developing south has long been a central concept among economists and policymakers. From 1950 to 1980, the north accounted for almost 80% of global GDP but only 22% of its population, and the south accounted for the remainder of global population and 20% global income.