Despite sustained critique of a neo-Malthusian focus on ‘overpopulation’, the issue continues to resurface regularly within international development discourse, particularly with respect to ‘sustainable’ development in relation to growing environmental security concerns. This suggests that the issue defies purely rational evaluation, operating on a deeper psychodynamic register. In this paper we therefore analyse the population question as a ‘scapegoat’, in the psychoanalytic sense of a fantasmatic construction concealing the gap between the symbolic order of international development and its persistent failure in practice. By conjuring the age-old image of animalistic barbarian hordes breeding inexorably and therefore overflowing their Thi...