The global economy is heading towards another meltdown despite the lessons of the last financial crisis, Gordon Brown has warned.
The former prime minister said that unless leaders take more action, the recent credit crunch could prove just the "trailer" to a string of crises.
"In 2008, when we were hours away from ATMs running out of money, small businesses being unable to pay their staffs, and schools and hospitals closing down through lack of cash flow, it felt as if the crisis of the century was upon us," he wrote in US magazine Newsweek.
"But if the world continues on its current path, the historians of the future will say that the great financial collapse of three years ago was simply the trailer for a succession of avoidable crises that eroded popular consent for globalisation itself.
"Those who believe that the world has learned from the mistakes that led to the crash are mistaken."
Mr Brown said the "resolve" to act seen immediately after the crisis has been replaced by indecision and vested interest. He urged politicians at the next G20 summit, which takes place in Cannes in November, to take control of a globalised financial system which is still "perilously" unregulated.
Mr Brown's comments come amid repeated warnings by European policy-makers that the debt crisis surrounding the eurozone's weaker nations could have a worse systemic effect on global markets than the collapse of the investment bank Lehman Brothers in 2008, which precipitated the last crisis.
They fear "with good cause" that if Greece has to restructure its debt - effectively default - it could unravel a chain of trades based on the problematic debt and lay bare the interconnectedness of institutions around the world, said Stephen Lewis, an analyst at Monument Securities.
They fear "with good cause" that if Greece has to restructure its debt - effectively default - it could unravel a chain of trades based on the problematic debt and lay bare the interconnectedness of institutions around the world, said Stephen Lewis, an analyst at Monument Securities.