But then, does she still acknowledge that they represent some sort of tradition or at least chain of thinking? Maybe it should be called something besides "liberalism" but it seems odd to say that you can't name a school of thought ex post facto.
This is perhaps just getting hung up on one part of what seems to be a more substantive corrective than that, though.
She doesn't spend much time on English thinkers. The focus is on French and German thinkers who (she says) codified liberalism. The word was really rare (foreign) in English until well into the 1860s, IIRC. Anyway, it's one of the criticisms of the book e.g. https://lareviewofbooks.org/article/what-they-meant-on-helen... (notably, this critic works for a libertarian think tank).
This is perhaps just getting hung up on one part of what seems to be a more substantive corrective than that, though.