Politics and propaganda tend to dominate national "learning", and those forces tend to escalate to prevent awareness. So not a lot of learning happens, historically ("history tends to repeat itself"; "history doesn't repeat, but it rhymes", etc)

If facts don’t work, intelligent, rational discourse and compromise don’t work, and economic pain don’t work, well, you’re out of options (at least options that can be discussed here).

By denying all other avenues of learning, the USA has chosen to revert to the oldest, which can't be disabled: natural selection.

Propaganda works. But it works better if the creator(s) are unethical and strongly committed. Usually the most unethical cooperate somewhat for their own gain, rather than compete.