Chris Rodley, Dev Varma, Kate Williams III (Directors) Marilyn Milgrom, Grant Romer, Rolf Borowczak, Bob Guccione, Dean Kuipers (Cast) (7 March 2006). Pornography: The Secret History of Civilization (DVD). Morris, Chris (14 January 2014). "After tough 2013, porn studios seem for a superior yr - "Globally, porn is a $97 billion field, according to Kassia Wosick, assistant professor of sociology at New Mexico State University.