Why was the original title of Lord of the Flies changed to its present one?

William Golding suffered ten rejections of his novel,
originally titled Strangers from Within, before finding a publisher
who wanted it. In September 1953 a young editor from the firm Faber and Faber, Charles
Monteith, wrote to Golding accepting the manuscript. In a letter written in December
1953, Moneteith notes his skepticism about the title. Nineteen possible titles would be
suggested before Lord of the Flies was nailed
down. 

In a letter dated February 25, 1954, (link below),
Monteith proposes Lord of the Flies as a title. According to
Monteith, someone else at the publishing company had offered that title, and everyone
who was involved from the firm seemed to agree that the title was apt because it
referred to one of the most memorable scenes from the story, it was impressive, and it
would likely boost book sales. Monteith assured Golding that if he didn't like the
title, he didn't have to go along with it. Evidently Golding didn't object. Monteith
also came up with the chapter titles and sent them to Golding for approval via
correspondence. Other letters show that the publisher worked with Golding to polish
Simon's characterization so that he didn't appear to self-righteous. It's fun to look
back at letters that show how such a literary classic arrived at its final
form.