Sergei Kovalev
1930–2021 (age 91)
Biography
Sergei Adamovich Kovalyov (also spelled Sergey Kovalev; Russian: Сергей Адамович Ковалёв; 2 March 1930 – 9 August 2021) was a Russian human rights activist and politician. During the Soviet period he was a dissident and, after 1975, a political prisoner.