> "Liberal democracies" are conflated with being part of the global upper class. Which major wealthy liberal democracy hasn't participated in colonialism or invasion in the last 200-300 years?
There are a few. Switzerland, Norway, Sweden (depending on how far back you go), Iceland, Ireland.
And, if you're going back 200 years and thinking about Great Britain, well, sure, they had colonies. They also arguably were not a liberal democracy. They had parliament, but they also had the king. Who controlled international policy (which determined whether they had colonies)? I don't know enough to answer that, but I'm not sure they should automatically be put in the "liberal democracy" bucket.