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It doesn't work on a nation-state level either - they tried the harsh punishment route after WW1 and it led to WW2.
to take your 1619 Project example. generational wealth has vast differences between black families and white families because of Jim Crow. as a society that supposedly prides itself on equal opportunity for all, we have not lived up to that and it creates a dissonance in the ways in which we say we hold certain ideals but act counter to those ideals.
since this is HN, if a CEO said one thing and behaved differently, you'd lose faith in that CEO. same thing applies to national image and national identity.