The worst economic turmoil since the Great Depression is not a natural phenomenon but a man-made disaster in which we all played a part.In the second part of a week-long series looking behind the slump,Guardian City editor Julia Finch picks out the individuals who have led us into the current crisis Alan Greenspan, chairman of US Federal Reserve 1987- 2006Only a couple of years ago the long-serving chairman of the Fed, a committed free marketeer who had steered the US economy through crises ranging from the 1987 stockmarket collapse through to the aftermath of the 9/11 attacks, was lauded with...