Naspers, Africa’s most valuable company, has appointed a new CEO, Phuthi Mahanyele-Dabengwa, making history in the process. Mahanyele-Dabengwa, 48, takes on the role and becomes the company’s first female and first Black chief executive. Her appointment follows a long streak of white, male CEOs leading the 104-year-old company. As CEO for the South Africa unit, Mahanyele-Dabengwa will lead its daily business...