This dissertation investigates the making of black radicals as a threat to the global/local political order, focusing on two historical periods in which a discourse on black extremism emerged in the United States. The first corresponds to the late 1960s and early 1970s, when the Black Panther Party was constructed as the leading domestic threat to the U.S. security; the second, to the late 2000s and 2010s, when activists and social movements engaged in anti-police brutality re-entered the realm of concrete domestic threats to the U.S. In both historical contexts such threat-making processes were also infused with discourses concerning other racialized global threats to the U.S. The second half of the 20th century was marked by the construction of black radicals as a threat intrinsically connected with anticommunism and invested toward national liberation movements in former colonies. In the 21st century, the threat of black radicals is re-articulated into one intimately linked to Islamic terrorism. These claims are based on a discursive genealogical analysis that explores historical records made by policing agencies regarding black extremism. The dissertation points to the persistence of the framing of black radicals as a security problem; within the United States, while the terms for these threat-making processes have been globally re-articulated. Hence, the black extremism discourse simultaneously refers to a racialized threat to the global and local political orders in the perception of the United States policing architecture.