Neurosurgeon and writer Henry Marsh on how "War and Peace" by Leo Tolstoy began a teenage love affair with all things Russian. "I burned the plastic coating off my NHS spectacle frames to reveal the revolutionary intellectual steel inside. And bought a young Communist League badge which I could wear on my black polo neck pullover." Marsh later drove across Europe to begin the first of many stints as a volunteer surgeon in Ukraine. "My life might easily have careered off in an entirely different direction if it had not been for Tolstoy," he says.

Producer Smita Patel