"In the popular imagination, geniuses are a breed apart. They are capable of insights or artistic creations that no amount of training and effort could produce in mere ordinary folk. You can squander your genius or fail to fulfil it but, ultimately, you either have it at birth or you don’t. Four new books about genius all interrogate this powerful myth. At the very least, they show that the soil in which genius grows matters at least as much as the seed, which is why particular cultures produce particular types of genius at particular times in history."Review essay in this weekend's FT.