This article proposes that 'internal colonisation' provides a necessary lens through which to explore the relationship between violence and race in contemporary liberal government. Contributing to an increasing interest in race in IR, this article proposes that whilst racism remains a vital demarcation in liberal government between forms of worthy/unworthy life, this is continually shaped by colonial histories and ongoing projects of Empire which manifest in the Global North and South in familiar, if not identical ways. In unpacking the concept of internal colonisation and its intellectual history from Black Studies into colonial historiography and political geography, I highlight how (neo)metropolitan states such as Britain, were always active imperial terrain and subjected to forms of colonisation. This recognises how metropole and colonies where bounded together through colonisation and how knowledge and practices of rule were appropriated onto a heterogeneity of racialised and undesirable subjects both within colonies and Britain. Bringing the argument up to date, I show how internal colonisation remains diverse and dispersed under liberal empireenhanced through the war on terror. To do this, I sketch out how forms of 'armed social work' central to counterinsurgency in the Afghanistan and Iraq, is also central to the management of sub-populations in Britain through the counterterrorism strategy Prevent. Treating (neo)metropoles such as the UK as part of imperial terrain helps us recognise the way that knowledge/practices of colonisation have worked across multiple populations and been invested in mundane sites of liberal government. This brings raced histories into closer encounters with the (re)making of a raced present.