Who is the protagonist in For the New Intellectual; the Philosophy of Ayn Rand by Ayn Rand?

Author, Ayn Rand, uses four novels to present her ideology in the book, For the New Intellectual; the Philosophy of Ayn Rand. John Galt is the protagonist in her novel, Atlas Shrugged. Galt's speech makes up the last chapter of the book and is used to explain Rand's Objectivist philosophy.