RRRaskolnikov
Goldfish
I'd really love to see an outline of a strategy that totally ignores Liberalism and maximizes medieval war power...anyone?
Early rush followed by catapults/maces/elephants domination try. This combo has no counter for cost till rifles/cannons. You need a suitable pangean map and ivory (and to be confident at the level you play at) to pull it off.
Other possible scenario: continent map. You can ignore liberalism and conquer your own land mass in most cases. You will have sufficient economy afterward to catch up the other continent in terms of techs. You might find out that the other continent is full of trading peaceniks. Not the most probable case, but it happens. In this case you are in for a late game challenge.
Basically it all comes down to your confidence at the level you play. If you are struggling, the lib race provides you with a freebie and thus leverage to be exploited to catch up with the AIs. All freebies will have this "catch up" effect. If you are confident in your skills, well, you can go for other challenges and take the bloody path

Cheers,
Raskolnikov