Is knowledge a social phenomenon?

In this paper, I offer some reasons for thinking that knowledge is a social phenomenon. My argument is based on Helen Longino’s work on scientific knowledge, in particular her 2002 book The Fate of Knowledge. Longino’s basic idea is that a scientific hypothesis or theory is justified when it emerges (relatively) unscathed from social interactions between scientists. If we accept–as Longino and many others do–that knowledge requires justification, it follows that scientific knowledge is a social phenomenon. I argue that much the same goes for other forms of empirical knowledge, such as historical knowledge, various forms of collective knowledge and our knowledge of the ‘social world’. But does it go for empirical knowledge in general? I offer some–admittedly far from conclusive–reasons for thinking that it might. I also argue that, even if it doesn’t, we still need to distinguish between two kinds of knowledge, one of which is constitutively social and the other of which isn’t. Scientific knowledge is a paradigm example of the former and simple perceptual knowledge is a paradigm example of the latter. The end result is a form of pluralism about knowledge