South Africa under apartheid sanctions (1962-1994)
The UN condemned apartheid for decades, imposed an arms embargo, and isolated South Africa diplomatically and economically. The pressure built slowly over more than 30 years before the system fell.
Sanctions hurt South Africa's economy but did not quickly change the government's policy.
Sustained isolation is credited as one factor in apartheid's eventual collapse and the 1994 elections.
It is the clearest case of UN pressure on a rights issue working, but only over decades, not years.
