This paper contributes to interdisciplinary reflection on settler colonialism and decolonisation by proposing an analysis of two characteristic traits of the "settler colonial situation": isopolitics and deep colonising. The first section of this paper outlines isopolitical relations as an alternative possibility beside sustained colonial domination on the one hand, and internationally recognised independence within an international system of formally independent polities on the other. Its second section concentrates on deep colonising, a notion that upsets traditional amelioristic narratives emphasising progressive processes culminating in the acquisition of social and political rights for colonised and formerly colonised peoples.Appraising concomitantly an isopolitical imaginary that persists in the present and the dynamics of deep colonising, and, more generally, focusing on the (im)possibility of decolonisation in settler colonial settings, can help reframing received narratives of decolonisation. Different colonial formations produce the different circumstances of their supersession. If colonialism and settler colonialism should be understood as structurally different phenomena, their decolonisation needs to be also framed separately. However, to move beyond settler colonialism and to imagine its decolonisation we need to understand how it works. For their exemplarity, this article outlines at first debates concerning the settler polities of the British Empire, polities that achieved independent status in the context of metropole-assisted processes envisaging ultimate substantive devolution as an enhancement of political ties, rather than their discontinuation. While these drawn-out constitutional processes have been the subject of extensive comparative scrutiny, the isopolitical nature of the imagination that underpinned them has remained unexplored (an isopolity can be described as a single political community joining separate jurisdictions). The independence of the 'other Englands' (as James Anthony Froude influentially described them in Oceana [1886]) was to constitute a British Empire of 'racial identity' (as Charles Wentworth Dilke also influentially put in Greater Britain [1890]). This settler colonial empire was thus imagined as a
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