"In our struggle for freedom and justice in the U.S., which has also been so long and arduous, we feel a powerful sense of identification with those in the far more deadly struggle for freedom in South Africa. We know how Africans there, and their friends of other races, strove for half a century to win their freedom by nonviolent methods. We have honored Chief Lutuli for his leadership, and we know how this nonviolence was only met by increasing violence from the State, increasing repression, culminating in the shootings of Sharpeville and all that has happened since. Today great leaders-Nelson Mandela and Robert Sobukwé-are among the hundreds wasting away in Robben Island prison. Against the massively armed and ruthless State, which uses torture and sadistic forms of interrogation to crush human beings-even driving some to suicide-the militant opposition inside South Africa seems for the moment to be silenced. It is in this situation, with the great mass of South Africans denied their humanity, denied their dignity, denied opportunity, denied all human rights; it is in this situation, with many of the bravest and best South Africans serving long years in prison, with some already executed; in this situation we in America and Britain have a unique responsibility. For it is we, through our investments, through our governments' failure to act decisively, who are guilty of bolstering up the South African tyranny. Our responsibility presents us with a unique opportunity. We can join in the one form of nonviolent action that could bring freedom and justice to South Africa, the action which African leaders have appealed for: a massive movement for economic sanctions."
January 1, 1970
https://en.wikiquote.org/wiki/Nelson_Mandela