* That "Separate but Equal" did not violate the constitution (Plessy v. Ferguson)
* Congress lacked the power to end slavery and that African Americans could never be citizens (Dred Scott).
* Tribal nations are "dependent nations" and that the role of the US is as a "ward to its guardian" (Cherokee Nation v. Georgia)
* Eugenics on the basis of mental illness is perfectly acceptable (Buck v. Bell, famously "three generations of imbeciles is enough"; also famously she wasn't an "imbecile")
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