Journalist Rebecca Traister's 'All the Single Ladies' explores the profound role that unmarried women have played in shaping American society. It begins in 2009, a year when for the first time in history, the percentage of married American women dropped below fifty. Traister delves into the past and present social structures to reveal how single women have historically spurred significant societal shifts. She examines class, race, and sexual orientation, underscoring how the choices and freedoms of unmarried women have brought about reforms ranging from temperance to education. With perspectives from both historical and contemporary women, Traister crafts a compelling narrative about the continuous transformation of American life through the actions and influence of single women.