$700B

+ Would clear the accumulated debt of the 49 poorest countries in the world ($375bn) twice over.
+ Is almost 5 times the annual amount of extra aid needed to achieve all the Millennium Development Goals on poverty, health, education etc ($150bn a year)
+ Is about 7 years of current global aid levels ($104bn in 2007)
+ Is enough to eradicate all world poverty for over two years (UNDP calculates it would take $300bn to get the entire world population over the $1 a day poverty line).

via Marginal Revolution