It has been argued that Alain Badiou could contribute to social work's engagement with social theory. This paper critically responds to this assertion and identifies some of the theoretical problems associated with Badiou's core conceptualisations. Divided into two sections, it will begin by outlining his main thematic preoccupations and will go on to focus on his interpretation of the significance of Saint Paul, the apostle. The second half of the paper will dwell on Webb's attempt to connect Badiou to social work so as to disrupt focal ideas on diversity' and difference'. This section will conclude by critically exploring Badiou's comments on children, children's rights and abuse. Although, so far receiving no attention in the social work literature, his interventions on these matters are problematic in that they imply that children lie outside the one world' politics that he promotes. Despite such criticisms, it is concluded Badiou's theorisation needs to be included within the academic literature of European social work.