There are plenty of things that are unknown, but are assumed reasonably to exist, even in the most basic sciences. Maybe 90 percent of the mass-energy in the universe is called "dark," because nobody knows what it is.

The educational system in the US was a highly predictable victim of the neoliberal reaction, guided by the maxim of "private affluence and public squalor." Funding for public education has sharply declined. As higher education is driven to a business model in accord with neoliberal doctrine, administrative bureaucracy has sharply increased at the expense of faculty and students. Cost-cutting leads to hyper-exploitation of the more vulnerable, creating a new precariat of graduate students and adjuncts surviving on a bare pittance, replacing tenured faculty.

So yes in theory there is a kind of a formal democracy and in many ways these were achievements and an improvement over the feudal system and more advanced than anything else in the world, but nothing that we ought to call democracy.

Its minority rule and majority limited rights. In fact it's set up that way. If you read the framers of the constitution, including James Madison, he was pretty clear about it.

Up until the First World War, when people turned anti-German, Germany had been described by American political scientists as the model of democracy.

What is failure for some is success for others. It depends on where they stand in the struggles over "democratic governance" and related rights - civil, social and economic, and broadly cultural, to adopt the framework of the Universal Declaration that is formally endorsed but constantly undermined.

...dissent, protest, presures of a wide variety that escape elite control can modify the calculus of costs of planners, and offer a slight hope that Washington can be compelled to permit at least some steps towards "justice, freedom and democracy" within its domains.