The outpouring of colonial Mexican social history that marked the 1970s had its origins in the previous decade. As Marcello Carmagnani's article points out, historians had come to appreciate the limits of institutional approaches to this field of inquiry. Contributions in demographic history, economic history, and ethnohistory strongly indicated that the dynamics of colonial life were other than had been identified to date and that even periodization and the eras of transition in the colonial period—let alone the reasons behind the transitions—might be different if measured by other standards.