Suppose a fairy godmother were to appear and offer you three wishes — not, as in the folk tales, for yourself, but for the future of the world or even just for the future of the country. My guess is that the instant answers from almost everyone would start with No. No more hunger; no more wars;no terrorism-, no nuclear weapons; no more unemployment. But suppose the fairy godmother were to reply, rather acidly, that she was in the business of granting positive wishes, not negative ones, and that you must say what /ou actually wanted to happen, how easy would it be to formulate what you wanted in the few brief moments before, in exasperation, she vanished into the blue?

There would be two kinds of difficulty in stating three wishes. The first kind would be the technical problem of finding positive answers to what is wrong: for example, unemployment is obviously appalling and should be replaced by full employment, but even if a wave of the wand would achieve this, what exactly would “full employment” be? Would it be a situation recognisably better than the present one, with far more people having jobs but with a considerable number still unwillingly out of work, or doing unpleasant and badly-paid jobs, or having to work through every weekend in order to make enough to keep the family going? A world in which nuclear weapons had, by magic, been made impossible to produce, would still be a world manufacturing cluster bombs, napalm, bacteriological weapons and expanding bullets. But the challenge of the fairy godmother would touch a deeper problem than these.