Memes

Liberalism is the ideological basis of Capitalism. When Capitalism was a progressive force, ie during the French Revolution, it was considered left wing. Now that Capitalism has become entrenched and turned to Imperialism, the progressive side is undeniably Socialism, while liberalism entrenches the status quo.

Simply saying that liberalism at one point was progressive does not mean history has not had several centuries of shifts and developments since then.