 In his review of "Ordinary Men" published in July 1992, Goldhagen expressed agreement with several of Browning's findings, namely, that the killings were not, as many people believe, done entirely by SS men, but also by Trawnikis; that the men of Unit 101 had the option not to kill, and – a point Goldhagen emphasizes – that no German was ever punished in any serious way for refusing to kill Jews.But Goldhagen disagreed with Browning's "central interpretation" that the killing was done in the context of the ordinary sociological phenomenon of obedience to authority.Goldhagen instead contended that "for the vast majority of the perpetrators a monocausal explanation does suffice".