However, most of Latin America was run by explicitly socialist, Marxist-influenced regimes
Are you talking about parties that have the word “socialist” in their name or are members of the Socialist International like the Parti Socialiste in France, or about parties that tried to transition to a socialist economy? Those are very different things! The first would probably be closer to true for Western Europe (I can’t think of a Western European nation that hasn’t been ruled by a Socialist International member party, though conservative parties generally ruled longer) and the second just isn’t true at all.
Are you talking about parties that have the word “socialist” in their name or are members of the Socialist International like the Parti Socialiste in France, or about parties that tried to transition to a socialist economy? Those are very different things! The first would probably be closer to true for Western Europe (I can’t think of a Western European nation that hasn’t been ruled by a Socialist International member party, though conservative parties generally ruled longer) and the second just isn’t true at all.