I read to this point and then skipped to the end.
"All four Americas must learn how to employ spectrum and both/and thinking to hold the myriad realities of the American experience. "
Must? Are you kidding us. Not happening. Get real.
There must be a fifth America, you know the Nihilists who know we are doomed and are just looking out for ourselves, which of course is the only sane thing to do. Any sane person will put their self-interest above all else. If you have no grandchildren who cares if the species even survives our death. Even Climate change doesn't matter. Which by the way you don't even mention. You are so concerned about racism and sexism that you disregard actual existential threats. Your whole 4 Americas thing denies the Spectrum view that you seem to advocate. There are 300 million plus Americas, turning us into groups diminishes each of us. It is stereotyping.
TEK