available as a podcast from the BBC website and iTunes for one week after broadcast. Until July 2014, listeners could also sign up for weekly email newsletters from Bragg, where he mentioned any additional information relating to the programme, along with snippets from his own personal and intellectual life. In 2009, selected transcripts of episodes from the programme were compiled in the book In Our Time: A Companion to the Radio 4 series, edited by Bragg. Since 2010, every episode of the programme has been available from its website as streaming audio, making it one of the first BBC programmes to have its entire archive released. Since 2011, the entire archive has been available to download as individual podcasts. Cultural impact The programme is considered one of the BBC's most successful projects, acknowledged to have "transformed the landscape for serious ideas at peak listening time". Frequent contributors to the programme since 1998 include A. C. Grayling, Angie Hobbs, Ian Stewart, Simon Schaffer, Martin Palmer, John Mullan, Steve Jones, Carolin Crawford, Paul Cartledge, Rana Mitter, and Julia Lovell. In 2005, listeners were invited to vote in a popularity contest for the "greatest philosopher in history" with the winner selected as the subject of the final programme before the summer break. With 30,000 votes cast, the contest was won by Karl Marx with 27.9% of the votes. Other shortlisted figures were David Hume (12.7%), Ludwig Wittgenstein (6.8%), Friedrich Nietzsche (6.5%), Plato (5.6%), Immanuel Kant (5.6%), Thomas Aquinas (4.8%), Socrates (4.8%), Aristotle (4.5%) and Karl Popper (4.2%). The poll was controversial but led to widespread reporting, and a boost in the programme's overall listenership, as various UK celebrities and news outlets championed their favourites. References External links In Our Time BBC Radio 4 homepage, with iPlayer archive of past programmes A Dewey Decimal classification of In Our Time episodes 1998 radio programme debuts Audio podcasts BBC Radio 4 programmes Educational broadcasting in the United Kingdom Philosophy podcasts Philosophy radio programs 2004 podcast debuts British podcasts