08:30Sunday SequenceFree Thinking, Karl Marx and Rend CollectiveBBC Radio Ulster Duration: 1 hour, 45 minutes Sun 6th May 2018, 08:30 on BBC Radio UlsterAudrey Carville discusses the legacy of Karl Marx with Professor Peter Singer Show more GenresFactualArts, Culture & the MediaReligion & EthicsFormatsDiscussion & TalkBrandSunday Sequence Source: BBC Online