I appreciate the opportunity offered by the editor to reflect on the relationship between cognitive and social psychology. This topic has interested me my entire professional life, because I was admitted to graduate school to study social psychology and then eventually migrated to cognitive psychology. The organization of this paper is as follows: I first relate my (somewhat puzzling) personal experiences that led me to wonder about relations between cognitive and social psychology. I suggest that, for many topics, the placement of a topic of study in one field or the other is arbitrary. Next I selectively review some common historical influences on the development of both fields, ones that have made them similar. Both grew from common seeds, which include Gestalt psychology as it became applied to a wider array of topics, experimental psychologists becoming interested in attitude change during and after World War II, and Bartlett's famous book on Remembering: A study in experimental and social psychology. Next I review some research from my lab that picked up themes from Bartlett's work and that, in some aspects, combines cognitive and social approaches. I also discuss the issue of memory conformity or the social contagion of memory, and conclude with thoughts about how social and cognitive psychologists might collaborate on an exciting new arena, creating empirical studies of collective memory. Copyright © 2010 John Wiley & Sons, Ltd.