Answer:
other play writers might have
I'm not gonna delete that answer, even though i know it's not right. King James I inspired him to write it because of his love for literature and because James had written a book called something like 'Daemonologie' about witches. Also, if you got in the kings good books, he would pay large sums of money, but if you got in his bad books the he would kill you. He only got the throne of England after Queen Elizabeth died.