The surprise of recent months is not that global economic growth is slowing, but that there is any growth at all. The credit crunch of the past year has not followed the path of recent economically debilitating episodes characterised by a temporary freezing up of liquidity – 1982, 1989, 1997-8 come to mind. This crisis is different – a once or twice a century event deeply rooted in fears of insolvency of major financial institutions.