We are met here to discuss "Social Knowledge: Heritage, Challenges, Perspectives." I shall argue that our heritage is something I shall call "the culture of sociology," and I shall try to define what I think this is. I shall further argue that, for several decades now, there have been significant challenges precisely to that culture. These challenges essentially consist of calls to unthink the culture of sociology. Given both the persistent reassertion of the culture of sociology and the strengt...