Gilbert Keith Chesterton was an influential English writer of the early 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." He wrote in an off-hand, whimsical prose studded with startling formulations. Chesterton wrote about 4000 essays on various subjects, and "Alarms and Discursions is one of his collections.