BILL GATES REMARKS AS PREPARED NELSON MANDELA ANNUAL LECTURE UNIVERSITY OF PRETORIA, SOUTH AFRICA JULY 17, 2016 Good evening ladies and gentlemen, Graça Machel, Professor Ndebele, Vice Chancellor de la Rey, members of the Mamelodi families, friends and dignitaries, it is a great honor to have the opportunity to speak today. The theme of this year’s…