Niccolo Machiavelli 's infamous The Prince is a short book about power - how to get it and how to hang on to it. But if 'he' were changed to 'she' throughout, would Machiavelli's masterpiece provide an insight into the remarkable success of a considerable number of women today, not least this century's longest surviving Prime Minister? Arena tests this phenomenon against the world's greatest power manual and wonders what has happened to feminism at the end of the 80s.