European and American scholars from the eighteenth through the mid-twentieth centuries thought that all societies passed through the same developmental stages, from primitive to advanced. Implicit in this developmental paradigm—one that has affected generations of thought on societal development—was the assumption that one could "read history sideways." That is, one could see what the earlier stages of a modern Western society looked like by examining contemporaneous so-called primitive societies in other parts of the world.

In Reading History Sideways, leading family scholar Arland Thornton demonstrates how this approach, though long since discredited, has permeated Western ideas and values about the family. Further, its domination of social science for centuries caused the misinterpretation of Western trends in family structure, marriage, fertility, and parent-child relations. Revisiting the "developmental fallacy," Thornton here traces its central role in changes in the Western world, from marriage to gender roles to adolescent sexuality. Through public policies, aid programs, and colonialism, it continues to reshape families in non-Western societies as well.

Until the 1940s, social life in Taiwan was generally organized through the family—marriages were arranged by parents, for example, and senior males held authority. In the following years, as Taiwan evolved rapidly from an agrarian to an industrialized society, individual decisions became less dependent on the family and more influenced by outside forces. Social Change and the Family in Taiwan provides an in-depth analysis of the complex changes in family relations in a society undergoing revolutionary social and economic transformation.

This interdisciplinary study explores the patterns and causes of change in education, work, income, leisure time, marriage, living arrangements, and interactions among extended kin. Theoretical chapters enunciate a theory of family and social change centered on the life course and modes of social organization. Other chapters look at the shift from arranged marriages toward love matches, as well as changes in dating practices, premarital sex, fertility, and divorce.

Contributions to the book are made by Jui-Shan Chang, Ming-Cheng Chang, Deborah S. Freedman, Ronald Freedman, Thomas E. Fricke, Albert Hermalin, Mei-Lin Lee, Paul K. C. Liu, Hui-Sheng Lin, Te-Hsiung Sun, Arland Thornton, Maxine Weinstein, and Li-Shou Yang.