Gilbert Keith Chesterton was one of the most influential English writers of the 20th century. His prolific and diverse output included journalism, philosophy, poetry, biography, Christian apologetics, fantasy and detective fiction.

Chesterton has been called the "prince of paradox". Time magazine, in a review of a biography of Chesterton, observed of his writing style: "Whenever possible Chesterton made his points with popular sayings, proverbs, allegories—first carefully turning them inside out.