ONE DAY IN THE LIFE OF IVAN DENISOVICH.
1970 film based on the novel by Aleksandr Solzhenitsyn, a political prisoner who suffered for years in Soviet gulags.
Highly recommended film: THE DITCH
A Catholic priest from China (who suffered religious persecution for 29 years in Communist Chinese laogai prison slave-labor farms, because he refused to renounce his faith) recommended this film to me, saying that this was what laogai were like.
To view English subtitles, please, click on CC button on the screen.
A great synopsis of SOCIALISM, NAZISM, COMMUNISM