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 Most of these laws have been repealed, but Buck v. Bell has never been directly overturned.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:

Behind the Scenes Minis: Paddles and The British Museum
31:02

Ashurbanipal
37:29

Six Impossible Episodes: Back-to-Court
41:15