And Lair said that after that, people in power in the US came up with three different strategies to stop so-called habitual criminals from reproducing.

One was marriage restriction.

We need to stop people who are habitual criminals from getting married and having kids.

And in Virginia, for example, there's a famous case, Loving v. Virginia, that people know as being about interracial marriage, but at that time, another one of the things that that married couple had to sign when they got married, they had to affirm that neither of them was a habitual criminal because Virginia had a statute that said you can't get married if you're a habitual criminal.

So marriage restriction was one of the tools that they used.

Um, and the other was sterilization.

But there was some difficulty with sterilization.

It starts with the KKK, the Ku Klux Klan, the American white supremacy hate group.