"The Global Slavery Index 2018 estimates that on any given day in 2016 there were 403,000 people living in conditions of modern slavery in the United States, a prevalence of 1.3 victims of modern slavery for every thousand in the country."
I'm not entirely sure how they got to that number though.
It's also important to remember that slavery is explicitly allowed in the US constitution, and there are certainly valid interpretations of modern slavery that would count significant numbers of those currently incarcerated as being victims of modern slavery - for example https://harvardpolitics.com/involuntary-servitude-how-prison...
"The Global Slavery Index 2018 estimates that on any given day in 2016 there were 403,000 people living in conditions of modern slavery in the United States, a prevalence of 1.3 victims of modern slavery for every thousand in the country."
I'm not entirely sure how they got to that number though.
It's also important to remember that slavery is explicitly allowed in the US constitution, and there are certainly valid interpretations of modern slavery that would count significant numbers of those currently incarcerated as being victims of modern slavery - for example https://harvardpolitics.com/involuntary-servitude-how-prison...