An increasingly popular approach to global justice claims we should be ‘integrationist,’ where integrationism represents an attempt to unify our theorising between different domains of global politics. These political theorists have argued that we cannot identify plausible principles in one domain, such as climate justice, which are not sensitive to general moral concerns. This paper argues we ought to reject the concept of integrationism. It shows that integrationism is either trivial, or it obscures relevant disagreement by ignoring the distinctive methodological and substantive commitments held by its opponents. The paper then argues that the relevant disagreement is actually about the role of practices for political philosophy and, as such, should be framed in terms of the distinction between practice-dependent and practice-independent theory. Finally, I provide my own account of that distinction, identifying a practice-dependent claim that those concerned about the narrowness of prominent accounts of global justice should target.