Pavel Mikhailovich Litvinov is a Russian-born U.S. physicist, writer, teacher, human rights activist and former Soviet-era dissident.

In 1965 a human rights movement emerged in the USSR. Those actively involved did not share a single set of beliefs. Many wanted a variety of civil rights — freedom of expression, of religious belief, of national self-determination. To some it was crucial to provide a truthful record of what was happening in the country, not the heavily censored version provided in official media outlets. Others still were "reform Communists" who thought it possible to change the Soviet system for the better.