Good article.
America's caste system has been built upon the white supremacist concept of racial inferiority, and money caste.
It was built on the backs of black Americans and other vulnerable groups. Until it is completely torn down, gutted, and then rebuilt into something that is fair to all Americans, the slow boil to an eventual collapse and revolution will continue.
The challenge will be how to gain allies without seeking to switch to another horrific caste system that is equally as intolerable as the American one has been. Payback is always tempting, but rarely solves the overall problem.
Not acknowledging how black Americans have been treated and claiming to seek equality for all while there is still injustice against many is one of the foundations of American racism. The system has to be destroyed first.