Phenomenal Blackness examines the changing interdisciplinary investments of key mid-century Black writers and thinkers, including the growing interest in German philosophy and critical theory. Mark Christian Thompson analyzes this shift in intellectual focus across the post-war decades, placing Black Power thought in a philosophical context.

Prior to the 1960s, sociologically oriented thinkers such as W. E. B. Du Bois had understood Blackness as a singular set of socio-historical characteristics. In contrast, writers such as Amiri Baraka, James Baldwin, Angela Y. Davis, Eldridge Cleaver, and Malcolm X were drawn to notions of an African essence, an ontology of Black being. With these perspectives, literary language came to be seen as the primary social expression of Blackness. For this new way of thinking, the works of philosophers such as Adorno, Habermas, and Marcuse were a vital resource, allowing for continued cultural-materialist analysis while accommodating the hermeneutical aspects of Black religious thought. Thompson argues that these efforts to reimagine Black singularity led to a phenomenological understanding of Blackness--a "Black aesthetic dimension" wherein aspirational models for Black liberation might emerge.