Why exactly was Nelson Mandela sent to prison?

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Nelson Rolihlahla Mandela was a South African anti-apartheid revolutionary, political leader, and philanthropist who served as President of South Africa from 1994 to 1999.

He was the country’s first black head of state and the first elected in a fully representative democratic election. His government focused on dismantling the legacy of apartheid by tackling institutionalised racism and fostering racial reconciliation. Ideologically an African nationalist and socialist, he served as the president of the African National Congress (ANC) party from 1991 to 1997.

Mandela was born to the Thembu royal family in Mvezo, British South Africa. He studied law at the University of Fort Hare and the University of Witwatersrand before working as a lawyer in Johannesburg.

There he became involved in anti-colonial and African nationalist politics, joining the ANC in 1943 and co-founding its Youth League in 1944. After the National Party’s white-only government established apartheid, a system of racial segregation that privileged whites, he and the ANC committed themselves to its overthrow.

Influenced by Marxism, he secretly joined the banned South African Communist Party (SACP). Although initially committed to non-violent protest, in association with the SACP he co-founded the militant Umkhonto we Sizwe in 1961 and led a sabotage campaign against the government. He was arrested and imprisoned in 1962, and subsequently sentenced to life imprisonment for conspiring to overthrow the state following the Rivonia Trial.

Mandela served 27 years in prison, split between Robben Island, Pollsmoor Prison, and Victor Verster Prison. Amid growing domestic and international pressure, and with fears of a racial civil war, President F. W. de Klerk released him in 1990.

Mandela was a controversial figure for much of his life. Although critics on the right denounced him as a communist terrorist and those on the far-left deemed him too eager to negotiate and reconcile with apartheid’s supporters, he gained international acclaim for his activism.

He received more than 250 honours—including the Nobel Peace Prize—and became the subject of a cult of personality. He is held in deep respect within South Africa, where he is often referred as the “Father of the Nation”.