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What happens when theories of racial hierarchies interact with reality? How are they contested, refuted and changed in light of that encounter? What role do experts, most notably social scientists, play here? And, what can these historical encounters tell us about how we should think of race and migration today? These are the questions which animate Sunmin Kim’s The Unruly Facts of Race: The Politics of Knowledge Production in the Early Twentieth-Century Immigration Debate (U Chicago Press, 2026). Taking as his focus the Dillingham Commission, a US government investigation into migrant groups established in 1907, Kim shows how theories of racial essentialism, which increasing were moving across the, at the time blurry, boundary between biology and society were used and contested in a moment when prominent political figures were eager to separate out the valued, long-established migrants from Western and Central Europe from those coming from Eastern and Southern Europe who all, on the face of it, were ‘white’. In doing so ideas such as ethnicity and the possibility of assimilation come to be mobilised. In turn Japanese migrants on the Pacific coast were placed beyond the pale of this possibility of assimilation and continued to be excluded. As Kim shows, not only did the commission report introduce some new vocabulary for thinking of race, but also played a key role in the development of US immigration quotas and a form of racial liberalism. This perspective, while accepting the possibility of a diverse body politic, rested on an assumption of a ‘native’ and ‘non-native’ element, including the possibility that some of the latter simply could never be ‘American’.

In our discussion we discuss the formation and activity of the Dillingham Commission. This includes discussing a number of key figures, such as Franz Boas who measures skulls for the commission and in so doing uses the same tools of the eugenicists and positivists to undercut their racist claims and Yamato Ichihashi who, while vociferously making the case that Japanese migrants such as himself are the ideal ‘Americans’ ends up being an example of the ‘insurmountable difference’ placed in front of such groups. We end by discussing how Zora Neale Hurston, once Boas’s student, provides a different way of conceiving of race and its place in immigration debates.

Your host, Matt Dawson is Professor of Sociology at the University of Glasgow and the author of G.D.H. Cole and British Sociology: A Study in Semi-Alienation (2024, Palgrave Macmillan) and co-editor of The Anthem Companion to Henri Lefebvre (2026, Anthem Press) along with other texts.

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