This month marks the 100th anniversary of the October Revolution which eventually led to Russia becoming the Soviet Union.
This documentary follows the events and aftermath of the revolution, mainly focusing on Lenin, Stalin and Trotsky. It features contributions from historians and writers as they debate the merits of the revolution.
Among the people supplying the arguments are Martin Amis, Orlando Figes, China Miéville Helen Rappaport and Simon Sebag Montefiore.
Russia 1917: Countdown to Revolution is on BBC Two.