Serious Marxian and feminist theory, in any sphere.

In many academic fields (including some social sciences, although obviously not econ), Marxist theory is still considered the go-to theory for what most people would simply consider "the economic way of thinking". This means that there's an absolutely huge amount of "Marxist analysis" of culture and society with uncertain status, because economically-literate folks simply haven't had a chance to look at it. Much of this analysis probably makes a lot of sense from the POV of modern economics; much of it is probably utterly nonsensical.

The situation when referring to other branches of "Continental" theorizing (and AIUI, this includes feminist theory) is roughly analogous, except that this particular kind of philosophy spans the range from utterly worthless stuff ("Uncle Bob's musings on life, the human mind and society!") to stuff which is probably valuable but we can't understand it properly because we lack more modern tools wrt. these topics (Freudian psychology might actually be a case in point here, especially in the light of cognitive-behavioral theory, perceptual-control theory and similar) and stuff which just needs some sort of cleanup, like Marxist analyses.