Presaging the disparities that led to mass incarceration in our era, the abolitionist minister William Goodell observed the quandary of black people … - Isabel Wilkerson

Many of the people who left the South never exactly sat their children down to tell them these things, tell them what happened and why they left and how they and all this blood kin came to be in this northern city or western suburb or why they speak like melted butter and their children speak like footsteps on pavement, prim and proper or clipped and fast, like the New World itself. Some spoke of specific and certain evils. Some lived in tight-lipped and cheerful denial. Others simply had no desire to relive what they had already left. The facts of their lives unfurled over the generations like an over-wrapped present, a secret told in syllables. Sometimes the migrants dropped puzzle pieces from the past while folding the laundry or stirring the corn bread, and the children would listen between cereal commercials and not truly understand until they grew up and had children and troubles of their own. And the ones who had half-listened would scold and kick themselves that they had not paid better attention when they had the chance.

A caste system is an artificial construction, a fixed and embedded ranking of human value that sets the presumed supremacy of one group against the presumed inferiority of other groups on the basis of ancestry and often immutable traits, traits that would be neutral in the abstract but are ascribed life-and-death meaning in a hierarchy favoring the dominant caste whose forebears designed it. A caste system uses rigid, often arbitrary boundaries to keep the ranked groupings apart, distinct from one another and in their assigned places.

One county in Virginia — Prince Edward County — closed its entire school system for five years, from 1959 to 1964, rather than integrate.