“
Iosif was particularly fond of the youngest, the sixteen-year-old schoolgirl Nadezhda, who reciprocated his feelings despite the twenty-three-year difference in their ages. To a young woman from a revolutionary family, he must have seemed like the ideal man: a tried-and-true revolutionary, brave and mysterious but also personable. In 1919 Stalin and Nadezhda tied the knot. As to the nature of their relationship before marriage, we can only guess.
”
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Oleg V. Khlevniuk (Stalin: New Biography of a Dictator)