Jacqueline Novogratz’s recent memoir, The Blue Sweater, tells the inspiring story of a woman who left a career in international banking to spend her life on a quest to understand and address global poverty. Through stories both hilarious and heartbreaking (including the titular one of her encountering a Rwandan boy wearing a sweater she gave away years earlier), she shares how traditional charity often fails, but how a new form of philanthropic investing called “patient capital”—an approach exemplified by Acumen Fund, the