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.[1]