 The success of this series led to other authored documentaries being produced, including The Ascent of Man, Jacob Bronowski's partial refutation of Kenneth Clark's thesis that the major driving force of cultural evolution was the arts, not the sciences.The genre also includes documentary series like David Attenborough's Life on Earth, Carl Sagan's , and Simon Schama's A History of Britain.The notion of authorship for a documentary is in tension with the pressures of modern corporate radio, television, and film production, which tend toward consolidation of all claims of authorship in the corporate producer entity.