Final answer:
The subject of this question is History. The movie 13th discusses the beginning of mass incarceration after the Civil War and how Southern states used manufactured laws to round up freed black people. The 13th Amendment had a loophole that allowed for the continuation of involuntary servitude as punishment for crime.
Step-by-step explanation:
The subject of this question is History. The question is asking about the beginning of mass incarceration after the Civil War and the role of the 13th Amendment in allowing the rounding up of freed black people based on manufactured laws. According to the information provided, after the Civil War, southern states enacted laws known as the Black codes to restrict the rights of freed black people. These codes included laws around vagrancy and idleness, which were used to arrest and imprison black people who were now free after the abolition of slavery. The 13th Amendment, while intended to abolish slavery, had a loophole that allowed for the continuation of involuntary servitude as punishment for crime.