
From 1885 to 1908, manyatrocities were committed in theCongo Free State (today theDemocratic Republic of the Congo) under the absolute rule of KingLeopold II of Belgium. These atrocities were particularly associated with the labour policies, enforced by colonial administrators, used to collectnatural rubber for export. Combined withepidemic disease,famine, masspopulation displacement and fallingbirth rates caused by these disruptions, the atrocities contributed to a sharp decline in the Congolese population. The magnitude of the population fall over the period is disputed, with modern estimates ranging from 1.5 million to 13 million.
At theBerlin Conference of 1884–1885, the European powers recognized the claims of a supposedly philanthropic organisation run by Leopold II, to most of theCongo Basin region. Leopold had long held ambitions for colonial expansion. The territory under Leopold's control exceeded 2,600,000 km2 (1,000,000 sq mi), more than 85 times the territory of Belgium; amid financial problems, it was directed by a tiny cadre of administrators drawn from across Europe. Initially the quasi-colony proved unprofitable and insufficient, with the state always close to bankruptcy. The boom in demand for natural rubber, which was abundant in the territory, created a radical shift in the 1890s—to facilitate the extraction and export of rubber, all vacant land in the Congo was nationalised, with the majority distributed to private companies asconcessions. Some was kept by the state. Between 1891 and 1906, the companies were allowed free rein to exploit the concessions, with the result being thatforced labour and violent coercion were used to collect the rubber cheaply and maximise profit. The Free State's military force, theForce Publique, enforced the labour policies. Individual workers who refused to participate in rubber collection could be killed and entire villages razed.
The main direct cause of the population decline was disease, which was exacerbated by the social disruption caused by the atrocities of the Free State. A number of epidemics, notablyAfrican sleeping sickness,smallpox,swine influenza andamoebic dysentery, ravaged indigenous populations. In 1901 alone it was estimated that 500,000 Congolese had died from sleeping sickness. Disease, famine and violence combined to reduce the birth-rate whileexcess deaths rose.
The severing of workers' hands achieved particular international notoriety. These were sometimes cut off byForce Publique soldiers who were made to account for every shot they fired by bringing back the hands of their victims.[vague] These details were recorded byChristian missionaries working in the Congo and caused public outrage when they were made known in theUnited Kingdom, Belgium, theUnited States, and elsewhere. An international campaign against the Congo Free State began in 1890 and reached its apogee after 1900 under the leadership of the British activistE. D. Morel. On 15 November 1908,[1] under international pressure, the Government of Belgium annexed the Congo Free State to form theBelgian Congo. It ended many of the systems responsible for the abuses. The size of the population decline during the period is the subject of extensivehistoriographical debate; there is an open debate as to whether the atrocities constitutegenocide. In 2020King Philippe of Belgium expressed his regret to the Government of Congo for "acts of violence and cruelty" inflicted during the rule of the Congo Free State, but did not explicitly mention Leopold's role. Some activists accused him of not making a full apology.

Even before his accession to the throne ofBelgium in 1865, the future kingLeopold II began lobbying leading Belgian politicians to create a colonial empire in the Far East or in Africa, which would expand and enhance Belgian prestige.[2] Politically, however, colonisation was unpopular in Belgium as it was perceived as a risky and expensive gamble with no obvious benefit to the country and his many attempts to persuade politicians met with little success.[2]

Determined to look for a colony for himself and inspired by recent reports from central Africa, Leopold began patronising a number of leading explorers, includingHenry Morton Stanley.[2] Leopold established theInternational African Association (Association internationale africaine), a "charitable" organisation to oversee the exploration and surveying of a territory based around theCongo River, with the stated goal of bringing humanitarian assistance and "civilisation" to the natives. In theBerlin Conference of 1884–85, European leaders officially recognised Leopold's control over the 2,350,000 km2 (910,000 sq mi) of the notionally-independentCongo Free State on the grounds that it would be afree trade area andbuffer state between British and French spheres of influence.[3]
In the Free State, Leopold exercised total personal control without much delegation to subordinates.[4] African chiefs played an important role in the administration by implementing government orders within their communities.[5] Throughout much of its existence, however, Free State presence in the territory that it claimed was patchy, with its few officials concentrated in a number of small and widely dispersed "stations" which controlled only small amounts of hinterland.[6] In 1900, there were just 3,000 white people in the Congo, of whom only half were Belgian.[7] The Free State was perpetually short of administrative staff and officials, who numbered between 700 and 1,500 during the period.[8]
In the early years of the Free State, much of the administration's attention was focused on consolidating its control by fighting the African peoples on the Free State's periphery who resisted the Free State's rule. These included the tribes around theKwango, in the south-west, and theUele in the north-east.[9] Some of the violence of the period can be attributed to African groups using colonial support to settle scores or white administrators acting without state approval.[10]
Ultimately the state's policy towards its African subjects became dominated by the demands which were made—both by the state itself and by the concessionary companies—for labour for the collection of wild produce of the territory. The system itself engendered abuses ...
The Free State was intended, above all, to be profitable for its investors and Leopold in particular.[12] Its finances were frequently precarious. Early reliance onivory exports did not make as much money as hoped and the colonial administration was frequently in debt, nearly defaulting on a number of occasions.[13] A boom in demand fornatural rubber in the 1890s, however, ended these problems as the Free State compelled Congolese males to work as forced labour collecting wild rubber which could then be exported to Europe and North America.[13] The rubber boom transformed what had been an unexceptional colonial system before 1890 and led to significant profits.[14] Exports rose from 580 to 3,740 tons between 1895 and 1900.[15]

To facilitate economic extraction from the Free State, land was divided up under the so-called "domain system" (régime domanial) in 1891.[16][17] All vacant land, including forests and areas not under cultivation, was decreed to be "uninhabited" and thus in the possession of the state, leaving many of the Congo's resources (especially rubber and ivory) under direct colonial ownership.[16][18]Concessions were allocated to private companies. In the north, theSociété Anversoise was given 160,000 km2 (62,000 sq mi), while theAnglo-Belgian India Rubber Company (ABIR) was given a comparable territory in the south.[19] TheCompagnie du Katanga andCompagnie des Grands Lacs were given smaller concessions in the south and east respectively. Leopold kept 250,000 km2 (97,000 sq mi) of territory known as the "crown domain" (Domaine de la Couronne) under personal rule, which was added to the territory he already controlled under the Private Domain (Domaine privé).[19][15]
Thus most economic exploitation of the Congolese interior was undertaken by Leopold and the major concessionaires.[19] The system was extremely profitable and ABIR made a turnover of over 100 per cent on its initial stake in a single year.[20] The King made 70 millionBelgian francs' profit from the system between 1896 and 1905.[17] The Free State's concession system was soon copied by other colonial regimes, notably those in the neighbouringFrench Congo.[21]
With the majority of the Free State's revenues derived from the export of rubber, a labour policy—known by critics as the "red rubber system"—was created to maximise its extraction. Labour was demanded by the administration as taxation.[a] This created a "slave society" as companies became increasingly dependent on forcibly mobilising Congolese labour for their collection of rubber.[23] The state recruited a number of black officials, known ascapitas, to organise local labour.[23] However, the desire to maximise rubber collection, and hence the state's profits, meant that the centrally enforced demands were often set arbitrarily without considering the number of workers or their welfare.[22] In the concessionary territories, the private companies which had purchased a concession from the Free State administration were able to use virtually any measures they wished to increase production and profits without state interference.[13]
The lack of a developed bureaucracy to oversee any commercial methods produced an atmosphere of "informality" throughout the state in regard to the operation of enterprises, which in turn facilitated abuses.[24] Treatment of labourers (especially the duration of service) was not regulated by law and instead was left to the discretion of officials on the ground.[22] TheAnglo-Belgian India Rubber Company (ABIR) and theSociété Anversoise du Commerce au Congo were particularly noted for the harshness with which their officials treated Congolese workers. The historianJean Stengers described regions controlled by these two companies as "veritable hells-on-earth".[25] Rubber harvesters were usually compensated for their labour with cheap items, such as a cloth, beads, a portion of salt, or a knife. On one occasion, a customary chief who ordered his subjects to gather rubber was rewarded with slaves.[26]

Workers who refused to supply their labour were coerced with "constraint and repression". Dissenters were beaten or whipped with thechicotte, hostages were taken to ensure prompt collection, and punitive expeditions were sent to destroy villages which refused.[22] The policy led to a collapse of Congolese economic and cultural life, as well as farming in some areas.[27] Much of the enforcement of rubber production was the responsibility of theForce Publique, the colonial military. The "force" had originally been established in 1885, with whiteofficers andnon-commissioned officers, and blackprivates, recruited from as far afield asZanzibar,Nigeria, andLiberia.[28] In the Congo, it recruited from specific ethnic and social demographics.[8] These included theBangala, and this contributed to the spread of theLingala language across the country, and freed slaves from the eastern Congo.[28]
The so-calledZappo Zaps (from theSongye ethnic group) were the most feared. Reportedly cannibals, the Zappo-Zaps frequently abused their official positions to raid the countryside for slaves.[29] By 1900, theForce Publique numbered 19,000 men.[30] In addition to the army, rubber companies employed their own militias, which often worked in tandem with theForce Publique to enforce their rule.[31]
The red rubber system emerged with the creation of the concession regime in 1891[32] and lasted until 1906 when the concession system was restricted.[25] At its height, it was heavily localised in theÉquateur,Bandundu, andKasai regions.[33]

Failure to meet the rubber collection quotas waspunishable by death. Meanwhile, theForce Publique were required to provide the hand of their victims as proof when they had shot and killed someone, as it was believed that they would otherwise use the munitions (imported from Europe at considerable cost) for hunting or to stockpile them for mutiny. In an oral testimony collected decades later, a man called Tswambe told about the hated state officialLéon Fiévez, who ran a district along the river 500 kilometres (300 mi) north ofStanley Pool:
All blacks saw this man as the devil of theEquator ... From all the bodies killed in the field, you had to cut off the hands. He wanted to see the number of hands cut off by each soldier, who had to bring them in baskets ... A village which refused to provide rubber would be completely swept clean. As a young man, I saw [Fiévez's] soldier Molili, then guarding the village of Boyeka, take a net, put ten arrested natives in it, attach big stones to the net, and make it tumble into the river ... Rubber causes these torments; that's why we no longer want to hear its name spoken. Soldiers made young men kill orrape their own mothers and sisters.[35]
One junior officer described a raid to punish a village that had protested. The officer in command "ordered us to cut off the heads of the men and hang them on the village palisades ... and to hang the women and the children on the palisade in the form of a cross".[36] After seeing a Congolese person killed for the first time, a Danish missionary wrote, "The soldier said 'Don't take this to heart so much. They kill us if we don't bring the rubber. The Commissioner has promised us if we have plenty of hands he will shorten our service.'" As a consequence, Peter Forbath claims, the rubber quotas were in part paid off in cut-off hands.[37] In Forbath's words:
The baskets of severed hands, set down at the feet of the European post commanders, became the symbol of the Congo Free State. ... The collection of hands became an end in itself.Force Publique soldiers brought them to the stations in place of rubber; they even went out to harvest them instead of rubber ... They became a sort of currency. They came to be used to make up for shortfalls in rubber quotas, to replace ... the people who were demanded for the forced labour gangs; and theForce Publique soldiers were paid their bonuses on the basis of how many hands they collected.

In theory, each right hand proved a killing. In practice, to save ammunition soldiers sometimes "cheated" by simply cutting off the hand and leaving the victim to live or die. Several survivors later said that they had lived through a massacre by acting dead, not moving even when their hands were severed, and waiting till the soldiers left before seeking help. In some instances a soldier could shorten his service term by bringing more hands than the other soldiers, which led to widespread mutilations and dismemberment.[38] HistorianDavid Van Reybrouck stated that the photographs of mutilated people have created a misconception that dismemberment of the living was a widespread practice. He wrote that while dismemberment of the living did occasionally happen, the practice was not as systemic as often presented.[39] Jean Stengers andDaniël Vangroenweghe [nl] have also stated there was no systemic practice of dismembering living people as a punishment for not producing enough rubber. Most cases of dismemberment of the living were caused by soldiers who had shot people and had cut off their hands thinking they were dead while they were in fact still alive.[40][41]
Leopold II reportedly disapproved of dismemberment because it harmed his economic interests. He was quoted as saying "Cut off hands—that's idiotic. I'd cut off all the rest of them, but not hands. That's the one thing I need in the Congo."[42]

One practice used to force workers to collect rubber included taking wives and family members hostage.[38] Leopold never proclaimed it an official policy, and Free State authorities in Brussels emphatically denied that it was employed. Nevertheless, the administration supplied a manual to each station in the Congo which included a guide on how to take hostages to coerce local chiefs.[43] The hostages could be men, women, children, elders, or even the chiefs themselves. Every state or company station maintained a stockade for imprisoning hostages.[44] ABIR agents would imprison the chief of any village which fell behind its quota; in July 1902 one post recorded that it held 44 chiefs in prison. These prisons were in poor condition and the posts at Bongandanga andMompono each recorded death rates of three to ten prisoners per day in 1899.[45] Persons with records of resisting ABIR were deported to forcedlabour camps. There were at least three such camps: one atLireko, one on the Upper Maringa River and one on the Upper Lopori River.[45]
Aside from rubber collection, violence in the Free State chiefly occurred in connection with wars and rebellions. Native states, notablyMsiri'sYeke Kingdom, theZande Federation, and Swahili-speaking territory in the eastern Congo under slave traderTippu Tip, refused to recognise colonial authority and were defeated by theForce Publique with great brutality, during theCongo–Arab War.[46] In 1895,a military mutiny broke out among the Batetela in Kasai, leading to a four-year insurgency. The conflict was particularly brutal and caused a great number of casualties.[47]
The presence of rubber companies such as ABIR exacerbated the effect of natural disasters such as famine and disease. ABIR's tax collection system forced men out from the villages to collect rubber which meant that there was no labour available to clear new fields for planting. This in turn meant that the women had to continue to plant worn-out fields resulting in lower yields, a problem aggravated by company sentries stealing crops and farm animals.[45] The post at Bonginda experienced a famine in 1899 and in 1900 missionaries recorded a "terrible famine" across ABIR's concession.[45]
Leopold sanctioned the creation of "child colonies" in which orphaned Congolese would be kidnapped and sent to schools operated by Catholic missionaries in which they would learn to work or be soldiers; these were the only schools funded by the state. More than 50% of the children sent to the schools died of disease, and thousands more died in the forced marches into the colonies. In one such march 108 boys were sent over to a mission school and only 62 survived, eight of whom died a week later.[48]
Indigenous Congolese were not the only ones put to work by the free state. Five hundred forty Chinese labourers were imported to work on railways in the Congo; however, 300 of them would die or leave their posts. Caribbean peoples and people from other African countries were also imported to work on the railway in which 3,600 would die in the first two years of construction from railroad accidents, lack of shelter, flogging, hunger, and disease.[49]

Cannibalism was well-established in parts of the Free State area when the State was founded.[52][53] In theForce Publique, cannibalism was strictly forbidden and could be punished by death, but it nevertheless happened.[54] The colonial administration seems to have done little to suppress this custom, sometimes rather tolerating it among its own auxiliary troops and allies. When sending out "punitive expeditions" against villages unwilling or unable to fulfil the government's exorbitant rubber quota, Free State officials repeatedly turned a blind eye both to arbitrary killings byForce Publique members and to the "cannibal feast[s]" among native soldiers that sometimes followed.[55][54][56]
During theCongo Arab war in 1892–1894, there were reports of widespread cannibalisation of the bodies of defeated combatants by theBatetela allies of the Belgian commanderFrancis Dhanis.[57] Though officials at that time expressed the hope that it would be possible to suppress such acts once the war was over, this did not fully happen. In 1898, Dhanis reported in a letter that some of his soldiers had recently killed, roasted, and completely eaten a group of six people.[54]
I suggest that it is impossible to separate deaths caused by massacre and starvation from those due to the pandemic of sleeping sickness (trypanosomiasis) which decimated central Africa at the time.
Historians generally agree that a dramatic reduction in the overall size of the Congolese population occurred during the two decades of Free State rule in the Congo.[59] It is argued that the reduction in the Congo was atypical and can be attributed to the direct and indirect effects of colonial rule, including disease and falling birthrate.[15]
The historianAdam Hochschild argued that the dramatic fall in the Free State population was the result of a combination of "murder", "starvation, exhaustion and exposure", "disease" and "a plummeting birth rate".[60]Sleeping sickness was also a major cause of fatality at the time. Opponents of Leopold's rule stated, however, that the administration itself was to be considered responsible for the spreading of the epidemic.[61] Violence and murder were likely not the primary causes of deaths, though detailed statistics are unavailable due to a lack of records. In a local study of theKuba andKete peoples, the historianJan Vansina estimated that violence accounted for the deaths of less than five per cent of the population.[62]
The sentries introduced gross and wholesale immorality, broke up family life, and spread disease throughout the land. Formerly native conditions put restrictions on the spread of disease and localized it to small areas, but the black Congo soldiers, moving higher and thither to districts far from their wives and homes, took the women they wanted and ignored native institutions, rights, and customs.
Diseases imported by Arab traders, European colonists and African porters ravaged the Congolese population and "greatly exceeded" the numbers killed by violence.[64]Smallpox,sleeping sickness,amoebic dysentery, venereal diseases (especiallysyphilis andgonorrhea), andswine influenza were particularly severe.[65] LawyerRaphael Lemkin attributed the quick spread of disease in Congo to the indigenous soldiers employed by the state, who moved across the country and had sex with women in many different places, thus spreading localised outbreaks across a larger area.[63] Sleeping sickness, in particular, was "epidemic in large areas" of the Congo and had a high mortality rate.[66] In 1901 alone, it is estimated that as many as 500,000 Congolese died from sleeping sickness.[67]
Vansina estimated that five per cent of the Congolese population perished from swine influenza.[68] In areas in which dysentery became endemic, between 30 and 60 per cent of the population could die.[69] Vansina also pointed to the effects of malnutrition and food shortages in reducing immunity to the new diseases.[62] The disruption of African rural populations may have helped to spread diseases further.[58] Nevertheless, historian Roger Anstey wrote that "a strong strand of local, oral tradition holds the rubber policy to have been a greater cause of death and depopulation than either the scourge of sleeping sickness or the periodic ravages of smallpox."[59]
It is also widely believed that birth rates fell during the period too, meaning that the growth rate of the population fell relative to thenatural death rate. Vansina, however, notes that precolonial societies had high birth and death rates, leading to a great deal of natural population fluctuation over time.[70] Among the Kuba, the period 1880 to 1900 was actually one of population expansion.[64]
A reduction of the population of the Congo is noted by several researchers who have compared the country at the beginning of Leopold's control with the beginning of Belgian state rule in 1908, but estimates of the death toll vary considerably, mainly due to the absence of reliable demographic sources about the region, as well as the sometimes unsubstantiated numbers mentioned by contemporaries in the late nineteenth and early twentieth century.[71] Estimates of some contemporary observers suggest that the population decreased by half during this period. According toEdmund D. Morel, the Congo Free State counted "20 million souls".[72] Other estimates of the size of the overall population decline (ormortality displacement) range between two and 13 million.[b] Ascherson cites an estimate byRoger Casement of a population fall of three million, although he notes that it is "almost certainly an underestimate".[75] Peter Forbath gave a figure of at least five million deaths;[76] John Gunther similarly estimates that Leopold's regime caused five to eight million deaths.[77] Lemkin posited that 75% of the population was killed.[63]
Since nocensus records the population of the region at the inception of the Congo Free State (the first was taken in 1924),[78] the precise population change in the period is not known.[79] Despite this, Forbath more recently claimed the loss was at least five million.[80] Demographer Jean-Paul Sanderson estimates the population in 1885 at around 10–15 million people.[81] In 2020, based on three scenarios of population decline, he concluded that to be demographically possible and reasonable, the decline should be in the range of one to five million. He considers a population decline of 1.2 million to be the most likely estimate.[82]
Other investigators put the number of deaths significantly higher.Adam Hochschild andJan Vansina used an approximate number of 10 million. Hochschild cites several recent independent lines of investigation, by anthropologist Jan Vansina and others, that examine local sources (police records, religious records, oral traditions, genealogies, personal diaries), which generally agree with the assessment of the 1919 Belgian government commission: roughly half the population perished during the Free State period, based on numbers from the rubber provinces. Since the first official census by the Belgian authorities in 1924 put the population at about 10 million, these various approaches suggest a rough estimate of a population decline by 10 million.[83] Jan Vansina returned to the issue of quantifying the total population decline, and discarded his earlier claim of 10 million; he concluded that the Kuba population (one of the many Congolese populations) was rising during the first two decades of Leopold II's rule, and declined by 25 per cent from 1900 to 1919, mainly due to sickness and that numbers from the rubber provinces could not be readily extrapolated to the entire Congo area.[84][85]
Others argued a decrease of 20 per cent over the first forty years of colonial rule (up to the census of 1924).[86] HistorianIsidore Ndaywel è Nziem estimates that 13 million died.[87] Louis and Stengers state that population figures at the start of Leopold's control are only "wild guesses", while calling E. D. Morel's attempt and others at coming to a figure for population losses "but figments of the imagination".[88] Generally, works based on the highest numbers have often been discredited as "wild" and "unsubstantiated", whereas authors who point out the lack of reliable demographic data are questioned by others, calling them "minimalists", "agnosticists" and "revisionists" who allegedly "seek to downplay or minimize the atrocities".[71][89]

Eventually, growing scrutiny of Leopold's regime led to a popular campaign movement, centred in the United Kingdom and the United States, to force Leopold to renounce his ownership of the Congo. In many cases, the campaigns based their information on reports from British and Swedish missionaries working in the Congo.[90]
The first international protest occurred in 1890 whenGeorge Washington Williams, an American, published an open letter to Leopold about abuses he had witnessed.[91] In a letter to theUnited States Secretary of State, he described conditions in the Congo as "crimes against humanity",[92] thus coining the phrase, which would later become key language ininternational law.[93] Public interest in the abuses in the Congo Free State grew sharply from 1895, when theStokes Affair and reports of mutilations reached the European and American public which began to discuss the "Congo Question".[94] To appease public opinion, Leopold instigated a Commission for the Protection of Natives (Commission pour la Protection des Indigènes), composed of foreign missionaries, but made few serious efforts at substantive reform.[95]
In the United Kingdom, the campaign was led by the activist and pamphleteerE. D. Morel after 1900, whose bookRed Rubber (1906) reached a mass audience. Notable members of the campaign included the novelistsMark Twain,Joseph Conrad andArthur Conan Doyle as well as Belgian socialists such asEmile Vandervelde.[96] In May 1903 a debate in theBritish House of Commons led to the passing of a resolution in condemnation of the Congo Free State. Soon after, the British consul in the town ofBoma, Roger Casement, began touring the Congo to investigate the true extent of the abuses. He deliveredhis report in December, and a revised version was forwarded to the Free State authorities in February 1904.[97]
In an attempt to preserve the Congo's labour force and stifle British criticism, Leopold promoted attempts to combat disease to give the impression that he cared about the welfare of the Congolese and invited experts from theLiverpool School of Tropical Medicine to assist.[98] Free State officials also defended themselves against allegations that exploitative policies were causing severe population decline in the Congo by attributing the losses to smallpox and sleeping sickness.[99] Campaigning groups such as theCongo Reform Association did not oppose colonialism and instead sought to end the excesses of the Free State by encouraging Belgium to annex the colony officially. This would avoid damaging the delicate balance of power between France and Britain on the continent. While supporters of the Free State regime attempted to argue against claims of atrocities, a Commission of Enquiry, appointed by the regime in 1904, confirmed the stories of atrocities and pressure on the Belgian government increased.[100]
In 1908, as a direct result of this campaign, Belgium formally annexed the territory, creating theBelgian Congo.[101] Conditions for the indigenous population improved dramatically with the partial suppression of forced labour, although many officials who had formerly worked for the Free State were retained in their posts long after annexation.[102] Instead of mandating labour for colonial enterprises directly, the Belgian administration used a coercive tax that deliberately pressured Congolese to find work with European employers to procure the necessary funds to make the payments. For some time after the end of the Free State the Congolese were also required to provide a certain number of days of service per year for infrastructure projects.[103]
... It was indeed a holocaust before Hitler's Holocaust. ... What happened in the heart of Africa was genocidal in scope long before that now familiar term, genocide, was ever coined.
The significant number of deaths under the Free State regime has led some scholars to relate the atrocities to latergenocides, though understanding of the losses under the colonial administration's rule as the result of harsh economic exploitation rather than a policy of deliberate extermination has led others to dispute the comparison;[105] there is an open debate as to whether the atrocities constitute genocide.[106] According to theUnited Nations'1948 definition of the term "genocide", a genocide must be "acts committed withintent to destroy, in whole or in part, a national, ethnical, racial or religious group".[107] According to Georgi Verbeeck, this conventional definition of genocide has prevented most historians from using the term to describe atrocities in the Free State; in the strict sense of the term, most historians have rejected allegations of genocide.[71]
SociologistRhoda Howard-Hassmann stated that because the Congolese were not killed in a systematic fashion according to this criterion, "technically speaking, this was not genocide even in a legally retroactive sense."[108]Adam Hochschild and political scientistGeorges Nzongola-Ntalaja rejected allegations of genocide in the Free State because there was no evidence of a policy of deliberate extermination or the desire to eliminate any specific population groups,[109][32] though the latter added that nevertheless there was "a death toll ofHolocaust proportions,"[108] which led him to call it "the Congo holocaust."[110]
... no reputable historian of the Congo has made charges of genocide; a forced labor system, although it may be equally deadly, is different.
It is generally agreed by historians that extermination was never the policy of the Free State. According toDavid Van Reybrouck, "It would be absurd ... to speak of an act of 'genocide' or a 'holocaust'; genocide implies the conscious, planned annihilation of a specific population, and that was never the intention here, or the result ... But it was definitely ahecatomb, a slaughter on a staggering scale that was not intentional, but could have been recognised much earlier as the collateral damage of a perfidious, rapacious policy of exploitation".[112] HistorianBarbara Emerson stated, "Leopold did not start genocide. He was greedy for money and chose not to interest himself when things got out of control."[42] According to Hochschild, "while not a case of genocide, in the strict sense", the atrocities in the Congo were "one of the most appalling slaughters known to have been brought about by human agency".[113][c]

Historians have argued that comparisons drawn in the press by some between the death toll of the Free State atrocities and the Holocaust duringWorld War II have been responsible for creating undue confusion over the issue of terminology.[116][79] In one incident, the Japanese newspaperYomiuri Shimbun used the word "genocide" in the title of a 2005 article by Hochschild. Hochschild himself criticised the title as "misleading" and stated that it had been chosen "without my knowledge". Similar criticism was echoed by historianJean-Luc Vellut.[116][112]
Allegations of genocide in the Free State have become common over time.[117]Martin Ewans wrote, "Leopold's African regime became a byword for exploitation and genocide."[118] According to historianTimothy J. Stapleton, "Those who easily apply the term genocide to Leopold's regime seem to do so purely on the basis of its obvious horror and the massive numbers of people who may have perished."[117]Robert Weisbord argued that there does not have to be intent to exterminate all members of a population in a genocide.[79] He posited that "an endeavor to eliminate a portion of a people would qualify as genocide" according to the UN standards and asserted that the Free State did as much.[108] Jeanne Haskin, Yaa-Lengi Meema Ngemi, andDavid Olusoga also referred to the atrocities as a genocide.[108][119]
In an unpublished manuscript from the 1950s, Lemkin, who had first coined the term "genocide" in 1944, asserted the occurrence of "an unambiguous genocide" in the Free State, though he blamed the violence on what he saw as "the savagery of African colonial troops".[105] Lemkin emphasised that the atrocities were usually committed by Africans themselves who were in the pay of the Belgians.[63] These "native militia" were described by Lemkin as "an unorganized and disorderly rabble of savages whose only recompense was what they obtained from looting, and when they were cannibals, as was usually the case, in eating the foes against whom they were sent".[63] Genocide scholarAdam Jones claimed that the underrepresentation of males in Congolese population figures after Leopold's rule is evidence that "outright genocide" was the cause of a large portion of deaths in the Free State.[120]
In 1999 Hochschild publishedKing Leopold's Ghost, a book detailing the atrocities committed during the Free State's existence. The book became a bestseller in Belgium, but aroused criticism from former Belgian colonialists and some academics as exaggerating the extent of the atrocities and population decline.[42] Around the 50th anniversary of the Congo's independence from Belgium in 2010, numerous Belgian writers published content about the Congo. Historian Idesbald Goddeeris criticised these works—including Van Reybrouk'sCongo: A History—for taking a softened stance on the atrocities committed in the Congolese Free State, saying "They acknowledge the dark period of the Congo Free State, but ... they emphasize that the number of victims was unknown and that the terror was concentrated in particular regions."[121]
The term "Congolese genocide" is also used to refer to the mass murder and rape committed in the eastern Congo in the aftermath of theRwandan genocide (and the ensuingSecond Congo War) between 1998 and 2003.[122][123]

The legacy of the population decline of Leopold's reign left the subsequent colonial government with a severe labour shortage and it often had to resort to mass migrations to provide workers to emerging businesses.[103]
The atrocities of the era generated public debate about Leopold, his specific role in them, and his legacy. Belgian crowds booed at his funeral in 1909 to express their dissatisfaction with his rule of the Congo. Attention to the Congo atrocities subsided in the years after Leopold's death, although his appearance inThe Congo byVachel Lindsay, that poet's best known work, memorialized those atrocities:
Listen to the yell of Leopold's ghost
Burning in Hell for his hand-maimed host.
Hear how the demons chuckle and yell
Cutting his hands off, down in Hell.[125]
Statues of Leopold were erected in the 1930s at the initiative ofAlbert I, while the Belgian government celebrated his accomplishments in Belgium. The release of Hochschild'sKing Leopold’s Ghost in 1999 briefly reignited debate in Belgium, which resurfaced periodically over the following 20 years.[126] In 2005, anearly day motion before theBritish House of Commons, introduced byAndrew Dismore, called for the recognition of the Congo Free State's atrocities as a "colonial genocide" and called on the Belgian government to issue a formal apology. It was supported by 48 MPs.[127]
Statues of Leopold in the Congo, which became independent in 1960, were relocated to the national museum. One was, however, briefly reinstated inKinshasa in 2005.[128][129] In 2020, following themurder of George Floyd in the United States andthe subsequent protests, numerous statues of Leopold II in Belgium were vandalised as a criticism of the atrocities of his rule in the Congo.[128][130] Several petitions called for the removal of the statues in Belgium and had tens of thousands of signees.[131][132][133][134] Other petitions, also signed by tens of thousands of Belgians, called for the statues to remain.[135][136]
On 30 June 2020, the 60th anniversary of Congolese independence,King Philippe sent a letter to Congolese PresidentFélix Tshisekedi, expressing his "deepest regret" for "acts of violence and cruelty" committed during the existence of the Free State and other transgressions that occurred during the colonial period, but did not explicitly mention Leopold's role in the atrocities. Some activists accused him of not making a full apology.[137]
Civilisation in Congoland.