Jennifer Senior writes about how about children change the lives of their parents—for better, and sometimes for worse. She’s the author of All Joy and No Fun: The Paradox of Modern Parenthood. Senior considers the impact of children on marriage, sex, work, friendships, and one’s sense of self. Her book draws on a wide variety of studies, surveys, social histories and interviews with parents. Then David Edelstein reviews Timbuktu, one of the five nominees in this year's Academy Award race for Best Foreign Language Film. It centers on the radical Islamist occupation of Mali.