What factors does Isabel Wilkerson attribute to the caste system that was created in the wake of the civil war? How does she think this contributed to the Great Migration that began in the
early 1900s?

Depending on how I read it, your Fifth Amendment is the answer.

Explanation:

The Fifth Amendment creates a number of rights relevant to both criminal and civil legal proceedings. In criminal cases, the Fifth Amendment guarantees the right to a grand jury, forbids “double jeopardy,” and protects against self-incrimination.