Russian military officer and a radical leader of the Decembrist revolutionaries.

The son of a government official, Pestel attended school in Dresden, Saxony, from 1805 to 1809. He entered the elite Corps of Pages in St. Petersburg in 1810 and, upon graduation in 1811, was commissioned as an ensign in the Lithuanian Regiment of Guards. After fighting in the Napoleonic Wars, he returned to St. Petersburg with a sense of Russia's backwardness in comparison with western and central Europe. In 1816 Pestel joined the Union of Salvation to discuss ideas for Russian reforms and the institution of a constitutional monarchy. In 1818 he organized a branch of the Union of Welfare at Tulchin, and in 1821 he organized the more radical Southern Society of Decembrists. His plan for the socioeconomic and political transformation of Russia, titled Russkaya Pravda (1824; “Russian Truth”), called for the execution of the imperial family, the emancipation of the serfs, the replacement of the tsarist autocracy by a republican form of government, and the allotment of land to the freed serfs.

During the succession crisis following the death of Alexander I and on the day before the Decembrists' planned uprising took place in St. Petersburg, Pestel was arrested in Tulchin (Dec. 25 【Dec. 13, Old Style】, 1825), having been betrayed by an officer newly recruited into the Southern Society. He was executed a few months later in Petropavlovsk fortress with four other Decembrists.