This essay juxtaposes the South Asian system of social hierarchies, conceptualized by Babasaheb Ambedkar as “graded inequality” with “serial relations” as conceptualized by Jean-Paul Sartre. Collective action against casteism faces internal problems. The complex psychological dynamics preserved over millennia through caste systems prevent solidarities across castes. The notion of “seriality” helps us to understand the material limitations placed by scripted functional roles on collective action. Internal divisions arising from prioritizing a caste or class perspective can be resolved with a better understanding of how “exigencies of sociality” create an ambiguous unity. A key lesson from Sartre is that it is only through praxis that consciousness remains open to the attractions of solidarity. Cultural otherness disconnected from the materiality of class (or gender) is a distortion. Conceiving of classes as historically determined while ignoring caste-being makes any analysis of revolutionary action incomplete. Reading Ambedkar and Sartre together opens the way for a genuinely historical materialist account of collective action against graded inequality.