By Martin Wolf
Is it possible for the vast mass of humanity to enjoy the living standards of today’s high-income countries? This is, arguably, the biggest question confronting humanity in the 21st century. It is today’s version of the doubts expressed by Thomas Malthus, two centuries ago, about the possibility of enduring rises in living standards. On the answer depends the destiny of our progeny. It will determine whether this will be a world of hope rather than despair and of peace rather than conflict.
The challenge is stark. World real incomes per head could rise 4.5 times by 2050 and world population by 40 per cent. This would mean a sixfold increase in global output, concentrated in the developing world (see charts). Is such an increase feasible? The answer he gives is: yes and no – yes, because changes in incentives, technology and social and political institutions would make a benign outcome feasible; and no, because the path we are now on is unsustainable. Professor Sachs is an optimistic prophet of doom. He falls in between those environmentalists who see no solution and those free-marketeers who see no problem. The remainder of this column can be read here.
Read the debate - contributors so far include Jeffrey Sachs, Paul Collier, William Easterly, Dennis Bennett and Brian Davey.
