Black radicalism and Marxism may be incommensurable historical programs.

Evidence

This study attempts to map the historical and intellectual contours of the encounter of Marxism and Black radicalism, two programs for revolutionary change. I have undertaken this effort in the belief that in its way each represents a significant and immanent mode of social resolution, but that each is a particular and critically different realization of a history. The point is that they may be so distinct as to be incommensurable. At issue here is whether this is so. If it is, judgments must be made, choices taken. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 111

Categorization

• DEFINE: Frames the central thesis: Black radicalism as a distinct historical realization not reducible to Marxism, establishing the boundaries of the tradition the reader wants to map.