John Kemp Great Debate-- John Kemp is a Reuters columnist. The opinions expressed are his own --

For the world monetary system, the financial crisis which erupted in the summer of 2007 is a cataclysmic shift that will prove every bit as significant as the outbreak of the First World War (which heralded sterling's demise as a reserve currency) and the suspension of gold convertibility in 1971 (which marked the end of bullion's monetary role).