Full Idea
None of Kripke's many achievements is more important than his breaking the spell of the linguistic as the source of philosophically important modalities.
Gist of Idea
A key achievement of Kripke is showing that important modalities are not linguistic in source
Source
Scott Soames (Significance of the Kripkean Nec A Posteriori [2006], p.186)
Book Reference
Soames,Scott: 'Philosophical Essays 2:Significance of Language' [Princeton 2009], p.186
A Reaction
Put like that, Kripke may have had the single most important thought of modern times. I take good philosophy to be exactly the same as good scientific theorising, in that it all arises out of the nature of reality (and I include logic in that).