a very good book, which i found out about very late, is https://www.amazon.com/Sociology-Philosophies-Global-Theory-Intellectual/dp/0674001877 & it has changed the way i look at philosophy. so, all accounts that are simply lineage-based (& but sketchily contextual) seem to me suspect. but i'm not sure this is worth making a dichotomy out of. let's just say, the more you know about a writer & her period, the deeper our current understanding can be.