Do you know anyone who is in slavery?

Do we still have slaves today? Ann Althouse links to the Walk Free Foundation, which says there are 45.8 million.

Unlike historical definitions of slavery in which people were held as legal property, a practice that has been universally outlawed, modern slavery is generally defined as human trafficking, forced labor, bondage from indebtedness, forced or servile marriage or commercial sexual exploitation.

According to this definition, even the United States has slaves — 57,700 (0.02% of the population).
[In the United States,] the most reported venues/industries for labour trafficking included domestic work, agriculture, traveling sales crews, restaurants/food service, and health and beauty services. In 2015, the most reported venues/industries for sex trafficking included commercial-front brothels, hotel/motel-based trafficking, online advertisements with unknown locations, residential brothels, and street-based sex trafficking.