Aside from laws saying who can participate in the government and who can and can not be a slave. The founding fathers where very anti authoritarian in every regard. The majority of them where divided on the issue of slavery and restricted the hell out of it to the best they could comprimise to.
The fact that your society allows slavery and has restircitve freedoms on women from the society not the state. Does not make the state auhoritarian.
Authoritarian would be mandating how people should live their lives, advocating dor protectionism economics, advocating for market regulations, surveliance, mandatory military service, having agressive police, standing military, and social engineering through subsidiese and taxes are all auoritarian and done through the state.
Just because society as a whole doesnt like something does not make it authoritarian.