Full Idea
Externalist theories do not give knowledge the sort of value that internalists want knowledge to have.
Gist of Idea
Externalist theories don't explain why knowledge has value
Source
John Greco (The Value Problem [2011], Intro)
Book Reference
'Routledge Companion to Epistemology', ed/tr. Bernecker,S/Pritchard,D [Routledge 2014], p.219
A Reaction
[He cites Pritchard 2008] This is not a very strong argument, given the uncertainties and complexities in the idea that we share a 'value'. If the value of knowledge is really instrumental (and loved no less because of that), then externalism could cope.