Communism

This is true, liberalism is the superstructure of capitalism. The big difference in the US is that historically, for workers, land was promised to settlers for dirt cheap if they were willing to kill indigenous Americans for it. This settler-colonialism meant that there was a lot of upward mobility for white USians. Now that the US is in the modern era, it supports itself mostly via imperialism, which bribes the upper segment of the working class into support for the system, and this viewpoint permeates to the middle section.