Women were not our slaves in the Paleolithic (when we were cavemen). At that time, we were like a pack of dogs, with the alpha getting all the girls and the rest of males, nothing. In many ways, we have now regressed to that stage.
Women became subservient to men at the beginning of the Neolithic (the agricultural revolution) as a result of the following deal: man works the fields (instead of hunting) and in exchange, he gets a woman all his own that he can fuck without interference from the alpha. This deal was brokered by the first religious confraternities (men only initiation groups), who were able to impose this deal both on the alpha and on women.
If we want to return to this situation, the only way we can get there is by creating new men-only confraternities that will be able to impose a similar deal. For the moment, it doesn't look good because normie men don't want to associate with us and even between incels there is no unity.