Sentence:  It is doubtful that Utopia is still widely read because More was medieval or even because he was a martyr - indeed , it is likely that these days many who read <WSD>Utopia</WSD> with interest do not even know that its author was a martyr . 
Meaning of the word marked with <WSD> tags:  a book written by Sir Thomas More (1516) describing the perfect society on an imaginary island