AI Overview:
Comparing the death tolls of these two ideologies is heavily debated among historians, making exact numerical comparisons difficult.
The seminal, though debated, The Black Book of Communism attributes roughly \(80\) to \(100\) million deaths to communist regimes (such as the USSR, China, Cambodia, and North Korea) through executions, man-made famines, and forced labour. [1, 2, 3]
Conversely, fascist regimes (primarily Nazi Germany and Fascist Italy) are widely estimated to have caused roughly \(40\) to \(50\) million deaths. This figure is largely driven by military casualties and systemic genocides like the Holocaust.