British politician Benjamin Disraeli was a successful novelist before he embarked on a political career. He was born a Jew but converted to Christianity at age 17. Known for his dedication to Queen Victoria and the British Empire, Disraeli became prime minister in 1874. His most important act in office was to prevent Russia from gaining strategic advantages in the Mediterranean after its victory in the Russo-Turkish War of 1877 and 1878, thereby preserving the balance of power in the region in favor of the British.