What can sociology reveal about philosophy as a socially conditioned practice, and what can it tell us about the nature of philosophical claims to knowledge? In What is the Sociology of Philosophy?, Carl-Göran Heidegren and Henrik Lundberg introduce the sociology of philosophy as a research field. Against the background of a survey of the history of the field, as well as of some of its central concepts, Heidegren and Lundberg present three case studies, all of which focus on the philosophical development in post-war Scandinavia, mainly Sweden and Norway.