[growtofill]

The most definitions include "the rule of law" (and you seem to be mistaken "limited" for "weak"):

> "Classical liberalism" is the term used to designate the ideology advocating private property, an unhampered market economy, the rule of law, constitutional guarantees of freedom of religion and of the press, and international peace based on free trade. > > – https://mises.org/library/what-classical-liberalism

The parent comment, however, argues that all the liberties were only available to the nobility, not that it was liberal in a different sense of the word that we use nowadays.

Comparing renaissance-age Poland to any of the modern-day countries you've mentioned doesn't make sense to me (also, it's Ukraine, not "the Ukraine").

[d__k]

In ancient Greece, a great deal (or even most) of the population were slaves. Yet, it does not prevent us from treating their system as democracy and compare it with the modern democracies and "democracies".

[growtofill]

The article mentions this fact:

> Poland had the szlachta, a broad citizen-warrior class that can be thought of as an upper middle class. This amounted to 10% of the population. That might sound like a very limited form of democracy, but it is the same percentage of the population as voted in the famous democracy of ancient Athens

I'd suggest reading the article if you haven't already. It doesn't argue or force a definition of 'liberal' or 'democratic' but describes the period of Polish history apparently poorly highlighted in the curriculum of US schools.