Is it a trick question, because there's never been proper communist or socialist Countries, so the deaths were all down to the remnants of the capitalist regimes?
No a legitimate question, although the numbers are blurry (as Holocaust victims aren't usually recorded and if they were the documents were probably destroyed) I'm going for 95 million plus .
Death By Agriculture Stalin's drive to collectivize farms was a historic disaster. https://www.hoover.org/research/death-agriculture In other News Marxists are cheering on the EUROPEAN UNION seizing the means of production & putting beurocrats in charge of growing our food .
The bulk of the tens of million were murdered by their own prople , starved to death or died in Gulags
You must have me confused with your angry vegan play thing . The Cambodian Communists killed a few million in the 1970s to start you off
Seizing the means of production & forced famine is a very effective way of killing millions of people . China Communists copied them
Seizing the actual food like old Churchill did to the millions of starved Indians would fit the bill more than, oops we ****ed up. See dust bowl
Of course Russia was well known for its democratic non violent government and abundance of food prior to the revolution
A cyclone blew away much of the rice crops & Japan occupied the neighbouring countries that would usually aid India . Climate change caused the Bengal famine not the British