This essay draws from the literature on religion’s revival as an important political force in international relations and assesses the effect that this revival might have on international order. It defines international order as a modicum of stability and co-operation among sovereign states and notes that some observers see religious communities threatening this order by encouraging fundamentalist communities that might undermine the more secular character of international order. After noting how authors have questioned the supposed “secular” character of international order, the essay suggests that religious communities have or could play a significant role in responding to conditions such as poverty and injustice that also threaten international order. As result the revival of religion and the plurality of religious communities throughout the globe might better be viewed as a source of support for international order.