In Leiter's recent post on Jason Stanley's nice article on the relationship between philosophy and the humanities, somebody asked, "What eternal truths have philosophers discovered in the last 2,000 years that have any bearing on life such that anyone in any discipline outside of philosophy ought to care?"
There was a lot of discussion on what philosophers (and analytic philosophers) have discovered, and so I cited Plantinga's argument in the Nature of Necessity for the conclusion that the existence of God and evil are compatible. Most theists and atheists who work on the problem of evil (at least in analytic philosophy) think that his argument was successful. I thought that this was a conclusion that people in the humanities (outside of philosophy) should care about.
I'm bringing attention to this discussion at this blog partly because, if you have the time, I want to ask that you make sure that I'm not saying false things. (One guy thought that I was kidding!) (Also, here, I am really asking only those people who work on PoE and are familiar with the literature.) Second, I would like to give good PR to philosophy of religion; it's largely ignored in these sorts of discussions, but I think it's an area where real progress - progress that nonphilosophers should care about - has been made. And most philosophers who frequent this blog will care that phil. religion gets good PR.