If ever proof were needed that one person can change the world, Nelson Mandela was that proof. His unwavering commitment to peace, tolerance, justice, and equality embodied those very concepts. Mandela inspired a movement, transformed a country, and reshaped our understanding of what the world could be. With the leadership of his External Affairs Minister Joe Clark and the influence of Canada's UN Ambassador Stephen Lewis, Prime Minister Mulroney diverged from his Conservative cousins in the U.K. and U.S. and stood strong against apartheid -- heeding the call of Mandela. Canada's stance in those days continues to be a source of pride for all of us.