Credit for originality.
At least nod the prior. "As Einstein's improvement on Plato's dictum says, ...".
By comparison, I was reading a paper on an alternative fuels process and found that its citations were all to 1990s and subsequent work.
This actively obscured the fact that the underlying concepts and idea dated from the 1960s, and excluded considerable significant prior research.
It would be ... like a study of evolutionary biology failing to credit Charles Darwin, and giving the impression, say, that the entire field grew out of recombinant DNA efforts of the 1970s.