About Sergei Kovalev
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. In 1969 Kovalyov was one of a group of dissidents who set up the Action Group for the Defense of Human Rights in the USSR, the first such independent body in the Soviet Union. In 1993, he co-founded the movement and later, the political party Choice of Russia (Выбор России), later renamed Democratic Choice of Russia (Демократический выбор России).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.