The position of Prime Minister was established in 1910, when the Union of South Africa was formed. He was appointed by the head of state—the governor-general until 1961 and the state president after South Africa became a republic in 1961. In practice, he was the leader of the majority party or coalition in the House of Assembly. With few exceptions, the governor-general/state president was bound by convention to act on the prime minister's advice. Thus, the prime minister was the country's leading political figure and de facto chief executive, with powers similar to those of his British counterpart.
The position of Prime Minister was abolished in 1984, when the State President was given executive powers after a new constitution was adopted – effectively merging the role of Prime Minister and State President. The last Prime Minister of South Africa, P. W. Botha, became the first executive State President after the constitutional reform in 1984 after Marais Viljoen's retirement.
In post-apartheid South Africa, the Inkatha Freedom Party has called for a return to a Westminster-style split executive with a Prime Minister as head of government, which is part of its overarching goal of avoiding a single-party South African state.[1]
World War II. Ratified the UN Charter. Issued the Fagan Report, which stated that complete racial segregation in South Africa was not practical and that restrictions on African migration into urban areas should be abolished. Lost the 1948 general election to National Party.
Tried to cut ties with United Kingdom. Removal of Coloured voters from the common voters roll. Extended 'treason trial' of 156 activists (including Nelson Mandela) involved in the Freedom Charter. Severed diplomatic relations with the Soviet Union. Died in office.
Abolished the Coloured voters roll. South African Border War escalated into a full-scale conflict. He managed policy of détente with African countries, and accepted to let black African diplomats living in white areas. He alienated an extremist faction of his National Party when it accepted the presence of Māori players and spectators during the 1970 New Zealand rugby union tour of South Africa. He unofficially supported, but refused to recognize officially, the neighbouring state of Rhodesia, which was ruled by a white minority government that had unilaterally declared independence from United Kingdom. In 1974, under pressure from US Secretary of State Henry Kissinger he pressured Ian Smith, the Prime Minister of Rhodesia, to accept in principle that white minority rule could not continue indefinitely. Resigned.
Remained Minister of Defence until 1980. Improved relations with the West. Authorized radical constitutional reform in 1983, including the creation of the Tricameral Parliament, which give a limited political voice to the country's Coloured and Indian population groups. The majority Black population group was still excluded. Began a secret nuclear weapons program in collaboration with Israel, which culminated in the production of six nuclear bombs. Creation of police counter-insurgency unit, Koevoet. Resignation of Vorster as State President in the wake of the Muldergate Scandal. Abolished the position of Prime Minister in 1984 and became executive State President.