AMERICA’s elder statesman of finance, Alan Greenspan, has shaken the White House by declaring that the prime motive for the war in Iraq was oil. In his long-awaited memoir, to be published tomorrow, Greenspan, a Republican whose 18-year tenure as head of the US Federal Reserve was widely admired, will also deliver a stinging critique of President George W Bush’s economic policies. However, it is his view on the motive for the 2003 Iraq invasion that is likely to provoke the most controversy. “I am saddened that it is politically inconvenient to acknowledge what everyone knows: the Iraq war is...