Neopythagoreans? Sick. There's a bit in Graeber's Utopia of Rules in the third essay where he identifies the harmonic spiritualism of the Pythagoreans in Sicilian Greek colonies under the Roman Empire as specifically a reactionary acceptance that the Empire itself was an unassailable monolith. Essentially, giving up on materialism because the material world was fixed and unchanging, and turning instead to a spiritual order of the cosmos that unsurprisingly reflected the same hierarchical order as that imposed by the Romans anyway.