Ruth Gilmore, indefatigable activist-scholar, is one of our most dangerous and important minds. A radical geographer with roots in the Black liberation movement of the 1960s and 1970s, she pioneered the study of mass incarceration's catastrophic impacts on inner-city families and neighborhoods, and together with Angela Davis has played a catalytic role in the creation of today's movement for prison abolition. This powerful collection of essays is an indispensable conceptual armory for that struggle.