At the turn of the century there was a modest debate, mainly conducted on the letters pages of the newspapers – back then, still the prime forum for public discussion – as to when, exactly, the new millennium and the 21st century began. Most assumed the start date was 1 January 2000, but dissenters, swiftly branded pedants, insisted the correct date came a year later. As it turned out, both were wrong.
The 21st century began in earnest, at least in the western mind, on a day that no one had circled in their diaries. Out of a clear blue sky, two passenger jets flew into the twin towers of the World Trade Center on 11 September 2001 and so inaugurated a new age of anxiety – a period in which we have lived ever since.
