Alexander Leonidovich Chizhevsky (Russian: Алекса́ндр Леони́дович Чиже́вский) (7 February 1897 – 20 December 1964) was a Soviet-era interdisciplinaryscientist, a biophysicist.[1] He is most notable for his use of historical research techniques to link the 11-year solar cycle, Earth’s climate and the mass activity of peoples.[1]