For centuries, people have been thinking and writing and fiercely debating about the meaning of marriage. Just a hundred years ago, Progressive era reformers embraced marriage not as a time-honored repository for conservative values, but as a tool for social change.

In Until Choice Do Us Part, Clare Virginia Eby offers a new account of marriage as it appeared in fiction, journalism, legal decisions, scholarly work, and private correspondence at the turn into the twentieth century. She begins with reformers like sexologist Havelock Ellis, anthropologist Elsie Clews Parsons, and feminist...