The twentieth century has been a time of immense change in virtually every facet of human life in the West. This edited volume examines how marriage, and how we theorize about marriage, has been transformed. The essays included address shifting marital trends, marriage as the focus of scientific study and the object of psychotherapeutic intervention, the impact of feminism and women's changing roles on marriage, research and treatment, and the legacy of slavery and pervasive racism on the marriage patterns of African Americans. The place of marriage within today's single parent, bi-nuclear and remarried families has gotten more ambiguous and complex. This book clarifies and explains many of the changes in marriage, marital research, and couples therapy in the 20th century in the West, emphasizing the need for new theory, research, and practice to take a more multifaceted and diverse perspective on marriage, divorce, and human pair-bonding in general into the twenty-first century.