4. The Soviet Union
From 1922 until 1989, Stalinist regime has led to over 20 million of people deaths. USSR instigated a regime of terror across territories of Russia and Eastern Europe. Their intention was to eliminate all non-communists, and obviously, make themselves one of the most evil countries on earth. They were sending prisoners to overcrowded Gulags – camps in which people were condemned to starvation, forced labor, and execution. One of the most evil techniques to get confessions was ‘the rat torture’. They would put rats in cages on prisoners’ abdomens and then they would heat the bars, which made rats escaping through human bodies.