Tribalism and racism were universal until Britons and Americans developed a new way of thinking.
The Biden administration had quietly implemented policies throughout the federal government based on this theory, and it is being taught in colleges and schools throughout the country. It has overrun much of the corporate world, and it has even secured a place in the training of many professions. The accusations made in closed training sessions are astonishingly venomous: Arrogant white supremacy is ubiquitous; white rage results when that supremacy is challenged; whites hold money and power because they stole it from other races; systemic racism and capitalism keep the injustices going.
All of this is based on categorically false assumptions about the past. We need only look at how the modern idea of our common humanity originated and developed to see that critical race theory has everything backward. A realistic history tells us that the thinkers and engineers of the Anglosphere, principally England and the U.S., are the heroes, not the villains, of this story, while the rest were laggards, not leaders.