With something like one quarter of the world's prison population being incarcerated in the USA, this documentary attempts to break down that fairly startling statistic and analyse just whether history and historical attitudes and prejudices have been instrumental in arriving at this situation. Crossing generations and centuries, the narrative postulates that much of this is down to grievances between ethnicities and to assertions that the white population is and has been using the penal system to unfairly and consistently persecute African Americans as effectively as state-sponsored…