Owen Gleiberman Chief Film CriticWe’ve never been too crazy about the phrase “embarrassment of riches.” Why the embarrassment? Can you really have too much of a good thing? When it comes to documentaries, we think you can’t, so we prefer to categorize the best documentaries of 2021 as a pride of riches. We included 20 on this list because we didn’t feel, in our right minds, that we could do without any of them.