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Routledge Handbook of Constitutional Law by Cheryl Saunders, Thomas Fleiner, Mark Tushnet

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35Constitutions, populations and demographic change*

Brian Opeskin and Enyinna Nwauche

35.1 Introduction

In late 2011 the world marked the arrival of its seven-billionth human inhabitant. It had taken just 12 years for the last billion people to be added to world population; the next billion is expected to be added within 14 years, by 2025. The United Nations projects that 2.4 billion people will be added to the world’s 2010 population by 2050. Some 97 percent of this growth will be in less developed regions—mostly in Africa and Asia—and nearly all in urban centres. Europe, by contrast, is projected to decline in absolute population, despite significant immigration.

Changes of this scale generate significant long-term social transformations ...

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