Memes

I would counter relative to the other answer you got that liberalism is based on a leveling of the political rights of citizens while resisting a leveling of economic rights (despite some calls for it even at the time). Feudal governments absolutely were also based on the defense of the rights of their citizens and indeed even some classical slave societies, but the difference is that those societies had [more pronounced and varied] castes which each had different political rights.

Liberalism was a revolution led by merchants and other propertied people against the aristocracy, i.e. people with the greatest economic rights opposing those with the greatest political rights, leaving the former completely unchecked except sometimes by popular power.

Incidentally, and this explains some of the bickering in this thread, communists of all stripes are people who advocate that both political and economic rights are leveled, which manifests as the economy being controlled by popular mandate rather than private ownership.

Anyway, I'm mainly commenting to say if you have other political questions, you can usually get very thorough answers from c/askchapo