In 1976 the protests in Soweto, also known as the Soweto Riots, against the government's use of Afrikaans as a compulsory medium of instruction in black schools became a massive uprising against apartheid. From then on Tutu supported an economic boycott of his country. He vigorously opposed the "constructive engagement" policy of the Reagan administration in the United States, which advocated "friendly persuasion". Tutu rather supported disinvestment, although it hit the poor hardest, for if disinvestment threw blacks out of work, Tutu argued, at least they would be suffering "with a purpose". In 1985 the US and the UK (two primary investors into South Africa) stopped any investments. As a result, disinvestment did succeed, causing the value of the Rand to plunge down more than 35 percent,