Working on a book about single women in the twenty-first-century, Traister made a startling discovery: historically, when women have had options beyond early heterosexual marriage, their resulting independence has provoked massive social change. Unmarried women were crucial to the abolition, suffrage, temperance, and labor movements; they created settlement houses and secondary education for women. Today, only 20% of Americans are wed by age 29, compared to nearly 60% in 1960. Through the lens of the single American woman, Traister covers issues of class, race, and sexual orientation.