Lev Kamenev arrested in 1902, ending his formal education. From that point on, he worked as a professional revolutionary, and was active in the capital St. Petersburg, Moscow and Tiflis. He adopted the surname Kamenev during this period. In the early 1900s, he married Olga Bronstein, a fellow Marxist (and younger sister of Leon Trotsky, who had also adopted a different surname). The couple had two sons together. Kamenev joined the Communists in 1901. He took a brief trip abroad in 1902, meeting Russian social democratic leaders living in exile, including Vladimir Lenin, whose adherent and close associate he became. He also
Lev Vygotsky this crisis are not entirely clear yet and are being discussed in scholarly circles. Lev Vygotsky was born to the Vygodskii family in the town of Orsha, Belarus (then belonging to Russian Empire) into a non-religious middle-class family of Russian Jewish extraction. His father Simkha Vygodskii was a banker. Young Lev Vygodskii was raised in the city of Gomel, where he was homeschooled until 1911 and then obtained formal degree (with distinction) in a private Jewish Gimnasium, which allowed him entrance to a university. In 1913 Lev Vygodskii was admitted to the Moscow University by mere ballot through a "Jewish