It may appear odd to write a review article focused on two books that are fundamentally different in intention and scope. The first is a self-conscious attempt by a moral theologian of conservative inclinations to contribute a Christian ethical perspective to the culture wars currently raging on both sides of the Atlantic on empire, race, and slavery. Its author, Nigel Biggar, is the Emeritus Professor of Moral and Pastoral Theology at the University of Oxford. The second book is a collection of papers by imperial and mission historians given at a workshop at the Victoria University of Wellington, New Zealand, in July 2018. Its brief is more limited, namely to explore the professed commitment of nineteenth-century Christian missions to bringing a gospel of peace into contexts that were frequently sites of violence, not least between indigenous peoples and European settlers and other colonial actors. Its geographical remit is limited to Africa and the Pacific. Biggar's book has provoked a predictable storm of criticism, both within the historical academy and beyond it. The Journal of Imperial and Commonwealth History, for example, rapidly published a 15,000–word rebuttal of Biggar's arguments by Alan Lester, Professor of Historical Geography at the University of Sussex, together with an almost equally lengthy reply by Biggar.1 In contrast, Geoffrey Troughton's edited volume, extremely valuable though it undoubtedly is, seems unlikely to attract notice beyond the limited constituencies of professional historians and scholars of mission studies. Although obviously differing in character, these two books, when set in juxtaposition, bring into focus some of the most pertinent issues raised for Christianity by the imperial past and the ambiguous role played within it by Christian missions.