Buck v. Bell is the 1927 SCOTUS decision that upheld the constitutionality of laws allowing involuntary sterilization of people deemed to be “unfit.” Most of these laws have been repealed, but Buck v. Bell has never been directly overturned.
Research:

SYMHC Classics: Red Summer 1919
32:53

Behind the Scenes Minis: Greetings and Context
25:54

The Memphis Massacre
40:48