https://www.history.com/topics/russia/gulag
https://www.historyandheadlines.com/10-reasons-stalin-might-worse-hitler/
https://real-life-villains.fandom.com/wiki/Joseph_Stalin
https://www.theguardian.com/century/1940-1949/Story/0,,127350,00.html
https://classroom.synonym.com/stalinism-vs-marxism-12079498.html