Ok – really tough (but good) question. I will try and keep them science oriented and keep clear of my own dreams (see my profile). So no wishing for everyone else to be rubbish at football so I can play for England in the world cup!
1 A cure for malaria. Let’s remove the blight that stops Africa developing
2 For the public (and media) to have a balanced view of the world and science – an end to extremism except in dreaming of making the world a better place to be
3 For people to be happy and work hard without requiring the reward of lots of money – leading to a more equal society
OH MY GOD – I have just read what I have written. I sound like a contestant on Miss World. Perhaps I should have added “World Peace” as well…