A great short explanation of why the US is not a democracy, and why capitalism is fundamentally at odds with democracy.
https://www.youtube.com/watch?v=srfeHpQNEAI

the study referenced in the video https://www.cambridge.org/core/journals/perspectives-on-politics/article/testing-theories-of-american-politics-elites-interest-groups-and-average-citizens/62327F513959D0A304D4893B382B992B