What if racialized mass incarceration is not a perversion of our criminal justice system&#x2019;s liberal ideals but rather a natural conclusion? Adam Malka raises this disturbing possibility through a gripping look at the origins of modern policing in the influential hub of Baltimore during and after slavery&#x2019;s final decades. He argues that America&#x2019;s new professional police forces and prisons were developed to expand not curb the reach of white vigilantes and are best understood as a uniformed wing of the gangs that controlled free black people by branding them&#x2014;and treating them&#x2014;as criminals. The post&#x2013;Civil War triumph of liberal ideals thus also marked a triumph of an institutionalized belief in black criminality.<br/><br/>Mass incarceration may be a recent phenomenon but the problems that undergird the &#x201C;new Jim Crow&#x201D; are very very old. As Malka makes clear a real reckoning with this national calamity requires not easy reforms but a deeper more radical effort to overcome the racial legacies encoded into the very DNA of our police institutions.