This is his attitude toward general literature; as evinced by his cautious disparagement of mellowed, broadly representative books, in favour of modem, locally American, and potentially ephemeral writings.
This sentence is from an essay of Lovecraft about amateur writing. The article is titled "The Case for Classicism." The word "modem" seems very out of context here, not to mention the fact that there were no internet or modems in Lovecraft's time. I couldn't find any secondary meaning of this word other than the one related to internet connection. I thought it could be a typo and downloaded the article from different sources but all of them are the same. Does this word have any other meaning? I still think it's a typo and it's actually "modern" but I wanted to ask just in case.