>>774462>marxists dot org says that it even predates class societyThis has been deboonked by modern anthropology, warrior classes emerged before private property and likely had a lot to do with the emergence of a class society per se.
>private property existed under slavery and serfdom though? or am i stupidThe relations around property are different in different systems and condition different superstructural features. Plus before capitalism relatively little was held as private property, so not really applicable in this sense. Regarding the shift in ideological systems, the development of individualist morality doesn't originate with the appearance of property. For instance, slaves used to be thought of as in some sense an extension of their master and the master could be held responsible for the slave. The moral systems are a bit unmoored from the means of production, since they are mainly a post-hoc justification for the system rather than some load bearing substructure. It does affect things like law and criminal justice systems, but these attitudes changing had a lot to do with cultural shifts like the adoption of religion or the enlightenment. There's an underlying class basis but it is also rooted in philosophical traditions which are entwined with religion and the availability of knowledge (like how the printing press led to a boom in literacy).
>>774463I don't think an internal monologue is really necessary to that model of consciousness (the post-bicameral part) though. Granted, the bicameral mind part does rest really heavily on
speech in particular, at least in the specific way Jaynes formulates it. He objectively got some of those details wrong though, like how the speech centers work exactly. The more broad strokes version has to do with attributing intention and agency internally vs externally though, and you (probably don't need language at all to do that.