In the late nineteenth and early twentieth centuries, the Woman’s Christian Temperance Union (WCTU) was a widely influential force for the globalization of evangelical ideas and social programs, which were enthusiastically absorbed and applied in the Australian context. Prominent among those ideas were the twin influences of evangelical holiness theology and postmillennial enthusiasm. The temperance movement, as Frances Willard described it in her speeches and writings, was of far deeper significance than a merely secular attempt at incremental social reform—its objective was nothing less than “the coming of the Kingdom of God,” and the programme into which its members were recruited was framed as “[a] holy war on every moral blight.” Willard used these concepts to frame the WCTU’s activities, arguing that women needed to extend their moral influence beyond the domestic sphere into the political realm, in order to protect themselves and their children. In Willard’s words, “mother-hearted women are called to be the saviours of the race.” The two ideas of holiness and postmillennialism combined together into a theopolitical vision that was particularly appealing for women in Australia, who had achieved (or were close to achieving) the franchise for the first time and were entering energetically into new and expansive fields of public usefulness. In this paper I explore the convergence of these two ideas within the nation-building project of the Australian WCTU, tracing their impact on the shape of politics and social life in the newly-federated nation.