It's wonderful to be here. What Indira didn't tell you is that this lecture series used to be called the Last Lecture. If you had one last lecture to give before you died, what would it be? I thought,...

I am an African. I owe my being to the hills and the valleys, the mountains and the glades, the rivers, the deserts, the trees, the flowers, the seas and the ever-changing seasons that define the face...