“Sir Thomas More (1477 - 1535) was the first person to write of a 'utopia', a word used to describe a perfect imaginary world. More's book imagines a complex, self-contained community set on an island, in which people share a common culture and way of life. He coined the word 'utopia' from the Greek ou-topos meaning 'no place' or 'nowhere'. It was a pun - the almost identical Greek word eu-toposmeans 'a good place'. So at the very heart of the word is a vital question: can a perfect world ever be realised?” Source
Here is a good source to read more about the author:Biography of Sir Thomas More