Robert Bolt is the screenwriter of Dr Zhivago .
Screenwriter Robert Bolt , who adapted the novel , was a one-time member of the British Communist Party ( leaving the Party in 1947 ) and well-known leftist who was prominent in the nuclear disarmament campaign , itself seen as a surrogate of the Cold War struggle between the West and the Soviet Bloc .
Doctor Zhivago -LRB-film-RRB-