What does it mean to devote yourself to helping others? Larissa MacFarquhar, a staff writer for The New Yorker, follows the joys and defeats of people living lives of extreme ethical commitment in her new book, Strangers Drowning. Jessica Jackley, co-founder of the revolutionary micro-lending site Kiva, in her book, Clay Water Brick, explores the triumphs and difficulties of using entrepreneurship to change the world. Sharing inspiring—and sometimes unsettling—stories of do-gooders from around the world, MacFarquhar and Jackley will challenge us to think about what we value most, and why.