The Black Book of Communism: Crimes, Terror, Repression is a 1997 book by Stéphane Courtois, Andrzej Paczkowski, Nicolas Werth, Jean-Louis Margolin, and several other European academics documenting a history of political repression by communist states, including genocides, extrajudicial executions, deportations, and deaths in labor camps and allegedly artificially created famines. The book was originally published in France as Le Livre noir du communisme: Crimes, terreur, répression by Éditions Robert Laffont. In the United States, it was published by Harvard University Press, with a foreword by Martin Malia. The German edition, published by Piper Verlag, includes a chapter written by Joachim Gauck. The introduction was written by Courtois. Historian François Furet was originally slated to write the introduction, but he died before he could.

The Black Book of Communism has been translated into numerous languages, has sold millions of copies, and is considered one of the most influential and controversial books written about the history of communism in the 20th century, in particular the history of the Soviet Union and other state socialist regimes. The work was praised by a broad range of popular-press publications and historians, while academic press and specialist reviews were more critical or mixed for some historical inaccuracies. The introduction by Courtois was especially criticized, including by three of the book's main contributors, for comparing communism to Nazism and giving a definitive number of "victims of communism", which critics have described as inflated. Werth's chapter, however, stood out as a positive. The book's title was chosen to echo The Black Book of Soviet Jewry, a documentary record of Nazi atrocities in the Eastern Front, written by Ilya Ehrenburg and Vasily Grossman for the Jewish Anti-Fascist Committee during World War II.

Overview The authors use the term communism to specifically mean Leninist and Marxist–Leninist forms of state-socialism, which was the dominant form of socialism during the 20th century following the October Revolution. It is distinguished from "small-c" communism, which has existed for millennia.

Introduction: "The Crimes of Communism" The introduction, written by Courtois, was the main source of controversy, and was acknowledged by Martin Malia in his foreword. Courtois writes that "Communist regimes turned mass crime into a full-blown system of government" and are responsible for a greater number of deaths than Nazism or any other political system. Courtois says that "Communism, the defining characteristic of the 'short twentieth century' that began in Sarajevo in 1914 and ended in Moscow in 1991, finds itself at center stage in the story. Communism predated fascism and Nazism, outlived both, and left its mark on four continents." Courtois goes on to explain what is meant by the term Communism in the book. According to Courtois, "[w]e must make a distinction between the doctrine of communism and its practice. As a political philosophy, communism has existed for centuries, even millennia." Citing Plato's Republic and Thomas More as communist examples of what he terms utopian philosophy, Courtois states that "the Communism that concerns us does not exist in the transcendent sphere of ideas. This Communism is altogether real; it has existed at key moments of history and in particular countries, brought to life by its famous leaders", citing Fidel Castro, Jacques Duclos, Vladimir Lenin, Georges Marchais, Ho Chi Minh, Joseph Stalin, and Maurice Thorez as examples of the latter.

Courtois writes that "[r]egardless of the role that theoretical communist doctrines may have played in the practice of real Communism before 1917", it was what he terms "flesh-and-blood Communism" which "imposed wholesale repression, culminating in a state-sponsored reign of terror." Courtois then asks whether the ideology itself is "blameless", stating that "[t]here will always be some nitpickers who maintain that actual Communism has nothing in common with theoretical communism" and that "it would be absurd to claim that doctrines expounded prior to Jesus Christ, during the Renaissance, or even in the nineteenth century were responsible for the events that took place in the twentieth century." Quoting Ignazio Silone ("Revolutions, like trees, are recognized by the fruit they bear"), Courtois says that "[i]t was not without reason" that the Bolsheviks, whose party was called the Russian Social Democratic Labour Party, renamed it as the Russian Communist Party, called themselves "Communists", and erected monuments to honor Tommaso Campanella and Thomas More. Courtois claims that "the crimes of Communism have yet to receive a fair and just assessment from both historical and moral viewpoints."

Foreword: "The Uses of Atrocity" In his foreword to the English-language and American edition, Malia states that "Communism has been the great story of the twentieth century" and "it had come to rule a third of mankind and seemed poised to advance indefinitely. For seven decades it haunted world politics, polarizing opinion between those who saw it as the socialist end of history and those who considered it history's most vital tyranny." According to Malia, "more than eighty years after 1917, probing examination of the Big Questions raised by the Marxist-Leninist phenomenon has hardly begun" and that "a serious historiography was precluded in Soviet Russia by the regime's mandatory ideology", further stating that "scholarly investigation of Communism has until recently fallen disproportionately to Westerns." Malia writes that "The Black Book offers us the first attempt to determine, overall, the actual magnitude of what occurred, by systematically detailing Leninism's 'crimes, terror, and repression' from Russia in 1917 to Afghanistan in 1989." Malia also argues against what he terms "the fable of 'good Lenin/bad Stalin'", stating that there never was a "benign, initial phase of Communism before some mystical 'wrong turn' threw it off track", claiming that Lenin expected and wanted from the start a civil war "to crush all 'class enemies'; and this war, principally against the peasants, continued with only short pauses until 1953." Malia further says that the Red Terror "cannot be explained as the prolongation of prerevolutionary political cultures", but rather as "a deliberate policy of the new revolutionary order; and its scope and inhumanity far exceeded anything in the national past." Malia laments that "'Positivist' social scientists ... have averred that moral questions are irrelevant to understanding the past" and criticizes this perspective by arguing that it "reduces politics and ideology everywhere to anthropology."

According to Malia, there is a "basic problem" in Western historiography of Communism which he describes as "the conceptual poverty of the Western empirical effort." Malia states that "[t]his poverty flows from the premise that Communism can be understood, in an aseptic and value-free mode, as the pure product of social process", faulting that "researches have endlessly insisted that the October Revolution was a workers' revolt and not a Party coup d'état, when it was obviously the latter riding piggyback on the former." According to Malia, "the central issue in Communist history is not the Party's ephemeral worker 'base'; it is what the intelligentsia victors of October later did with their permanent coup d'etat, and so far this has scarcely been explored." Malia then goes on to describe "two fantasies holding out the promise of a better Soviet socialism than the one the Bolsheviks actually built." The first one is "the 'Bukharin alternative' to Stalin" which Malia describes as "a thesis that purports to offer a nonviolent, market road to socialism—that is, Marx's integral socialism, which necessitates the full suppression of private property, profit, and the market." The second one "purports to find the impetus behind Stalin's 'revolution from above' of 1929–1933 in a 'cultural revolution' from below by Party activists and workers against the 'bourgeois' specialists dear to Bukharin, a revolution ultimately leading to massive upward mobility from the factory bench." Malia writes that "perhaps a moral, rather than a social, approach to the Communist phenomenon can yield a truer understanding for the much-investigated Soviet social process claimed victims on a scale that has never aroused a scholarly curiosity at all proportionate to the magnitude of the disaster."

Estimated number of victims According to the introduction, the number of people killed by the Communist governments amounts to more than 94 million. The statistics of victims include deaths through executions, man-made hunger, famine, war, deportations, and forced labor. The breakdown of the number of deaths is given as follows: 65 million in the People's Republic of China 20 million in the Soviet Union 2 million in Cambodia 2 million in North Korea 1.7 million in Ethiopia 1.5 million in Afghanistan 1 million in the Eastern Bloc 1 million in Vietnam 150,000 in Latin America 10,000 deaths "resulting from actions of the international Communist movement and Communist parties not in power"

According to Courtois, the crimes by the Soviet Union included the following: The execution of tens of thousands of hostages and prisoners The murder of hundreds of thousands of rebellious workers and peasants from 1918 to 1922 The Russian famine of 1921 which caused the death of 5 million people The decossackization, a policy of systematic repression against the Don Cossacks between 1917 and 1933 The murder of tens of thousands in the Gulag during the period between 1918 and 1930 The Great Purge which killed almost 690,000 people The dekulakization, resulting in the deportation of 2 million so-called kulaks from 1930 to 1932 The death of 4 million Ukrainians (Holodomor) and 2 million others during the famine of 1932 and 1933 The deportations of Poles, Ukrainians, Moldovans, and people from the Baltic states from 1939 to 1941 and from 1944 to 1945 The deportation of the Volga Germans in 1941 The deportation of the Crimean Tatars in 1944 Operation Lentil and deportation of the Ingush in 1944

This and other communist death tolls have been criticized by various historians and scholars. Any attempt to estimate a total number of killings under communist regimes depends greatly on definitions, ranging from a low of 10–20 million to as high as 110 million. Criticism of some of the estimates is mostly focused on three aspects, namely that the estimates were based on sparse and incomplete data when significant errors are inevitable, that the figures were skewed to higher possible values, and that those dying at war and victims of civil wars, Holodomor, and other famines under Communist regimes should not be counted.