Abstract: In this article I want to draw upon examples from European settlement in the Americas, Australasia and South Africa in order to argue that modern colonisation and imperialism, despite considerable variation, drew upon a range of justificatory principles which constituted a background theory, or worldview, that was invoked in part or in its entirety in justifying the civilising mission which was viewed by its proponents as both a right and a duty. I begin by showing how the infamous ‘Requirement’ (‘Requerimiento’) of 1513 becomes intelligible as a performative utterance when connected to the constellation of ideas which makes it warrantably assertible, to use John Dewey’s terminology. It is not so much about the land or its use in ...