Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions.
Edward WittenRelated topics
ability benefit elementary need string usingRelated quotes
There are people who strictly deprive themselves of each and every eatable, drinkable, and smokable which has in any way acquired a shady reputation. They pay this price for health. And health is all they get for it. How strange it is. It is like paying out your whole fortune for a cow that has gone dry.
Mark Twain
Because most people are not sufficiently employed in themselves, they run about loose, hungering for employment, and satisfy themselves in various supererogatory occupations. The easiest of these occupations, which have all to do with making things already made, is the making of people: it is called the art of friendship.
Laura Riding