 During this time he was specifically vocal in advocating the Swiss Canton model, in which a heterogeneous population could be governed under a system free of the oppression of any one dominant group that typically plagues a "Winner Takes All" system.After informing PW Botha, the Prime Minister before F. W. de Klerk, that peace in South Africa would arrive only through releasing Nelson Mandela, he was relegated to an insignificant post as Ambassador to the United States.From 1986 to 1991, he served as South Africa's last ambassador the US who was also a National Party member.