Michael Ignatieff presents five programmes recounting the ups and downs of key groups in 20th-century intellectual history.
2: The Frankfurt School. After fleeing Hitler's Germany in the thirties, Marxist philosophers Theodore
Adorno and Max Horkheimer seek refuge in wartime Hollywood. Back in Germany after the war, and initially feted by the radical Frankfurt campus, Adorno is horrified to find his lecture disrupted by bare-breasted female demonstrators.
Producer William Catlin