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Great political thinkers from history are being cheered by famous faces of today in a series of Daily Politics films.
Reporter Giles Dilnot talks to those who are championing those who are known to historians, but perhaps not to the wider public.
The films are airing on Friday's Daily Politics - broadcast at lunchtimes on BBC and at midnight on BBC Parliament - which are then on iPlayer for UK viewers for seven days, but the full films can also be seen below.
Some of the contributors then join Andrew Neil in the studio for a debate with his guests of the day to follow up the ideas in their film.