American philosopher and ontologist, he is known for his work in ontology (information science), philosophy of biology, evolutionary psychology, and philosophy and popular culture. Arp has chapters in more than 25 books in the genre known colloquially as Philosophy and Popular Culture, including Metallica and Philosophy, Family Guy and Philosophy, Lost and Philosophy, 24 and Philosophy, The Office and Philosophy, Battlestar Galactica and Philosophy, Watchmen and Philosophy, Final Fantasy and Philosophy, Alice in Wonderland and Philosophy, True Blood and Philosophy, 30 Rock and Philosophy, and others.