It’s ultimately under the umbrella of ideologies that support and prop up capitalism.
I think that’s a good summary.
“Classical liberalism” is basically what modern libertarians want: a laissez-faire capitalist economy, a secular representative government with very limited powers, prioritizing individual freedom over collective well-being, etc.
In my part of the world “liberalism” is now commonly used to refer to a different set of priorities: creating economic safety nets, regulating business, promoting universal healthcare, unions, gender equality, racial equality, etc. Though capitalism and a secular representative government are still part of the mix.
Assuming that the world was once just, and recently changed to become unjust, is completely flawed. History provides endless examples of people with power and money doing horrible things and facing little or no consequences.