Like many other social science historians, since the late 1980s I have reflected on how postmodernist thinkers like Foucault and Derrida are useful for historians. In 1995 I taught a graduate course on the history of social history, and I looked back on the origins of the field through the eyes of my students who were intrigued with postmodernism. I realized that time has crept up on me. I barely noticed that this field that we developed over the years is no longer young but has come of age and is now part of the accepted canon, one of many subdisciplines. Indeed, my students thought of social science history in much the same way that social science historians viewed traditional political history, a field whose assumptions and perspectives should be critically analyzed, challenged, and revised. These students helped me to see postmodernist criticisms in a new light, not as a sharp break from social science history but rather as emerging at least in part from long-term developments within the field itself. The contributors to the debate on these pages see postmodernism in this way. In various ways, they contend that these challenges, poststructuralist and otherwise, can help us to see within social science history contradictions and tensions that result in both strengths and weaknesses. We can learn from postmodernism without accepting it uncritically; we can reevaluate materialist social history in light of new challenges without rejecting social science history's benefits.