Throughout the 1980s, Harvard professors for the most part avoided involvement with South Africa in protest of apartheid, and then president Derek C. Bok was a vocal supporter of work by the U.S. to prompt reform in South Africa. But the University was slow to pull its own investments out of companies doing business in South Africa, insisting that through its proxy votes, it could more effectively fight apartheid than by purging stocks from its portfolio. But after a decade of protests, Harvard did adopt a policy of selective divestment, and by the end of the 1980s was almost completely out of South Africa.