Horkheimer rated Neumann’s Behemoth best-in-class empirically but theoretically deficient

Evidence

Sounding through these criticisms was Horkheimer’s genuine opinion of Neumann’s book: it was rich in material and better than anything else that had been published on the subject, but it failed on the theoretical level, since it did not deal with the decisive `cultural-anthropological’ problems. — Rolf Wiggershaus, The Frankfurt School, 1202