Hegel's lord-bondsman dialectic has been of especially great interest to progressive and radical Hegelians—broadly speaking, politically left-leaning interpreters of Hegel who object to certain social hierarchies and demand their abolition. They read Hegel as giving an account of how ‘lordship’ over others is an inherently unstable and unsatisfying social formation, even for its supposed beneficiaries. Marxists, feminists and post-colonial theorists have all found inspiration in Hegel's analysis of the lord and bondsman by applying it to concrete relations of oppression, such as capitalism, patriarchy, or racism. In contrast, recent scholarship on Hegel's views on race and colonialism has cast doubt on whether his systematic political philosophy and philosophy of history can be of similar use to progressives. Hegel was undeniably a Eurocentric thinker, but philosophers like Robert Bernasconi and Alison Stone have convincingly shown that he was also a racist and a defender of colonialism. Crucially, however, few of the scholars who write on Hegel's pro-colonialism have analysed this feature of Hegel's thought in connection with the lord-bondsman dialectic. In this article, I argue for two connected theses. First, I argue that contrary to the hopes of some progressive defenders of Hegel, we cannot easily separate the lord-bondsman dialectic from Hegel's pro-colonialism. This is because Hegel himself appealed to the lord-bondsman dialectic to argue that colonial slavery educated its victims, and could therefore be temporarily justified. Second, I argue that this pro-colonial reading of the dialectic, though largely ignored by contemporary interpreters, was in fact recognized and embraced by a group of Hegelians in North America known as the St Louis Hegelians. They used the lord-bondsman dialectic as a basis for a qualified defence of pre-Civil War American slavery.