Alexander Sergeyevich Lappo-Danilevsky (Russian: Александр Сергеевич Лаппо-Данилевский; 27 January 1863 – 7 February 1919) was a Russian historian and sociologist.
He attended the University of St. Petersburg, graduating from the Faculty of History and Philology in 1886.
[1] He played an influential role in introducing Nikolai Kondratiev to sociology, economics and scientific method.
[2] He is buried in the Smolensky Cemetery.
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