‘Slavery, race, caste’ explains how the most sustained form of early colonial violence involved the enslavement of millions of non-Europeans. Slavery was not simply an oppressive practice: it was given moral, ethical, even philosophical justification by a broader ideology of race, which continued—indeed, strengthened—after slavery was abolished. Racial theories developed first in defence of slavery were elaborated, as imperialism expanded, to justify colonial rule of allegedly ‘backward’ peoples. The contemporary practice of decoloniality attempts to arrest, reconfigure, and transform the collective memory of slavery and ideology of race which sustained it. Race and racism in the West and caste in Asia make for interesting comparisons.