Boris Abramovich Berezovsky (23 January 1946 – 23 March 2013) was a Jewish business oligarch, government official and mathematician. Born in Moscow, to Abram Markovich Berezovsky (1911–1979), a Jewish civil engineer in construction works, and his wife, Anna Aleksandrovna Gelman (22 November 1923 – 3 September 2013), Berezovsky always stressed his Jewish heritage. Berezovsky made his fortune in Russia in the 1990s when the country went through privatization. He profited from gaining control over various assets, including the country’s main television channel, Channel One. He was at the height of his power in the later Yeltsin years, when he was deputy secretary of Russia’s Security Council, a friend of Boris Yeltsin’s influential daughter Tatyana, and a member of the Yeltsin “family” (inner circle). Berezovsky helped fund Unity – the political party, which formed Vladimir Putin’s parliamentary base, and was elected to the Duma on Putin’s slate.