I know there was one in the USSR in 1932 and one in the PRC in 1958. I know that they’re a major talking point of the “communism killed 100 million people” myth. I’d like to be able to understand them better and extract valid criticisms out of them so I don’t end up looking ignorant or sycophantic while trying to explain why I support communist countries.
You can read more on this and famines in other countries under capitalist colonial domination in the book Late Victorian Holocausts. Untold millions died before and after the year 1900 as the brits abolished "inefficient" community grain stores and El Nino droughts destroyed lands that had been fertile for decades, while blind private market ideology kept any food aid from being disbursed so as to keep the "natural" price of rice and grain from being disrupted. Food was exported to the imperial core while millions starved.
All famines have some parameterization you can apply of how much fault was due to political decisions versus extraneous factors like climate. This is something that will be endlessly debated according to peoples' own particular beliefs.