Kirsty Young's castaway this week is the radical thinker, writer and broadcaster Tariq Ali. Forty years since the streets of London were filled with demonstrators, Tariq Ali describes how he came to be involved in anti-establishment politics and how, from an early age, he felt drawn towards those people who were the underdogs of society. He was born to privileged, atheist parents in Pakistan, he led his first street protest at 12 and his first strike at 15 He became increasingly political until, after a military coup, his parents were advised to send him out of the country for his own safety and so he came to study at Oxford.

He travelled to Vietnam at the height of the war to observe and document the suffering there and also travelled to Bolivia and Palestine. His role as an anti-establishment agitator was cemented when he led two revolutionary marches in London in 1968. Forty years on - and after a successful career as a film-maker and writer - he says it remains important to voice dissenting views and he insists that despite his privilege and status he remains firmly outside the establishment.

[Taken from the original programme material for this archive edition of Desert Island Discs]

Favourite track: Meda Ishq Vi Toon by Pathaney Khan