How do you explain the emergence of the intelligentsia in the 1830s and 1840s? Why were these young men so hostile to the existing order?

Please use sources:

1. T. Riha (ed.), Readings in Russian Civilization, vol. II.
2. Mackenzie and Curran, A History of Russia, the Soviet Union and beyond 6th edition
3. Bsil Dmytryshyn. Imperial Russia, A Source Book, 1700-1917