History of serfdom process, referred to as "second serfdom" or "export-led serfdom", persisted until the mid-19th century and became very repressive and substantially limited serfs' rights. Before the 1861 abolition of serfdom in Russia, a landowner's estate was often measured by the number of "souls" he owned, a practice made famous by Gogol's 1842 novel "Dead Souls". Many of these countries abolished serfdom during the Napoleonic invasions of the early 19th century. Serfdom remained in force in most of Russia until the Emancipation reform of 1861, enacted on February 19, 1861, though in the Russian-controlled Baltic provinces it had been abolished at the
Iranians in Russia and the Mountain Jews, who descend from Persian Jews from Iran. People from the former and contemporary boundaries of Iran have a long history in the territory of what is modern-day Russia, stretching back thousands of years. Throughout history, the Caucasus region was usually incorporated into the Iranian world, and large parts of it were ruled by empires based in modern-day Iran for a time span encompassing many centuries, or were under its direct influence. From the early 16th century up to including the early 19th century, Transcaucasia and a part of the North Caucasus (namely Dagestan), were ruled by