I believe the poster is talking more specifically, about the history and development of policing in the United States. > but implying police and prisons were i

I believe the poster is talking more specifically, about the history and development of policing in the United States. > but implying police and prisons were invented after 1865 surely takes the cake I don't think they, nor anyone, is making this assertion. There is a direct lineage from modern day police departments to slave patrols. If it helps to understand it, think about Jim Crow laws of the 19th and 20th centuries. This set of laws criminalized being Black and were enforced by police.