The Firstborn is a play in three acts written by Christopher Fry and published by Oxford University Press. The second edition, which is a small blue cloth hardcover volume with gilt lettering on the spine, was published in the same year. The play tells the story of the biblical character Moses and his struggles with his family, his people, and his faith. The play explores themes of leadership, sacrifice, and redemption, and is known for its poetic language and philosophical depth.