Michael E. Langley

Leopold was the founder and sole owner of the Congo Free State, a private colonial project undertaken on his own behalf as a personal union with Belgium. He used Henry Morton Stanley to help him lay claim to the Congo, the present-day Democratic Republic of the Congo. At the Berlin Conference of 1884–1885, the colonial nations of Europe authorised his claim and committed the Congo Free State to him. Leopold ran the Congo, which he never personally visited, by using the mercenary Force Publique for his personal gain. He extracted a fortune from the territory, initially by the collection of ivory and, after a rise in the price of rubber in the 1890s, by forced labour from the native population to harvest and process rubber.

Leopold's administration was characterized by systematic brutality and atrocities in the Congo Free State, including forced labour, torture, murder, kidnapping, and the amputation of the hands of men, women, and children when the quota of rubber was not met. In one of the first uses of the term, George Washington Williams described the practices of Leopold's administration of the Congo Free State as "crimes against humanity" in 1890

 Patrice Émery Lumumba[e] (/pəˈtriːs lʊˈmʊmbə/ ⓘ pə-TREESS luu-MUUM-bə;[3] born Isaïe Tasumbu Tawosa;[4] 2 July 1925 – 17 January 1961) was a Congolese politician and independence leader who served as the first prime minister of the Democratic Republic of the Congo (then known as the Republic of the Congo) from June until September 1960, following the May 1960 election. He was the leader of the Congolese National Movement (MNC) from 1958 until his assassination in 1961. Ideologically an African nationalist and pan-Africanist, he played a significant role in the transformation of the Congo from a colony of Belgium into an independent republic. 

During the Congo Crisis, Mobutu, serving as Chief of Staff of the Army and supported by Belgium and the United States, deposed the democratically elected government of left-wing nationalist Patrice Lumumba in 1960. Mobutu installed a government that arranged for Lumumba's execution in 1961, and continued to lead the country's armed forces until he took power directly in a second coup in 1965.

To consolidate his power, he established the Popular Movement of the Revolution as the sole legal political party in 1967, changed the Congo's name to Zaire in 1971, and his own name to Mobutu Sese Seko in 1972. Mobutu protected his rule through an intensely autocratic regime and came to preside over a period of widespread human rights violations.