Natan Sharansky (Hebrew: נתן שרנסקי; born 20 January 1948) is a Ukrainian-born, Israeli politician, professional chess player and author. He served as Chairman of the Executive for the Jewish Agency from June 2009 to August 2018, and currently serves as Chairman for the Institute for the Study of Global Antisemitism and Policy (ISGAP), an American non-partisan organization. A former Soviet dissident, he spent nine years imprisoned as a refusenik during the 1970s and 1980s.