In interviews, Mailer discussed what motivated him to invest so much time interviewing everyone involved with Gary Gilmore. On one occasion, he said that Gilmore "appealed to me because he embodied many of the themes I've been living with all my life long". In another interview, he asserted that perhaps the most important theme of the book is that "we have profound choices to make in life, and one of them may be the deep and terrible choice most of us avoid between dying now and 'saving one's soul'".