Stephen Lewis is the UN Secretary-General's Special Envoy for HIV/AIDS in Africa. He also sits on the WHO's Commission on the Social Determinants of Health and he is a director of the Stephen Lewis Foundation, dedicated to easing the pain of HIV/AIDS in Africa. His roles over the past two decades include Deputy Executive Director of UNICEF and Canadian Ambassador to the UN. Recipient of many honours, he is well known for his deeply compassionate commitment to issues of justice and his concern for Africa. He is this year's CBC Massey Lecturer.