Elon Musk needs no introduction. The world’s richest person, he's a divisive figure, a villain to some, a genius to others. Like many powerful billionaires, he also finds himself willing and able to affect policy, even amid a war. Our colleague Walter Isaacson spent two years shadowing Musk. The result is a 670-page biography that’s certainly making waves, as Walter and Christiane discussed when they sat down in New York. 

Also on today’s show: #MeToo Founder Tarana Burke & Mariam Mangera, Project Coordinator of the National Shelter Movement of South Africa; New Yorker staff writer Susan Glasser