Abstract: An international consensus on the content of domestic constitutional law has structural ‘rights’-related components. The former requires roughly democratic systems for choosing representatives/executives. The consensus favours some forms of judicialised constitutional review, though the precise form is open to choice. The rights component includes a standard list of ‘core’ civil rights, including in this category equality along a number of dimensions – though not class or income. The rights-component is fundamentally neo-liberal. This is clearest in connection with ‘second generation’ social and economic rights, which – the consensus holds – can be recognised in a constitution but should not be vigorously enforceable (in systems where there is judicial enforcement of constitutional rights). The rights of free expression and political association must be specified in ways that allow political challenges to be mounted against efforts – including legislative programmes of political parties that control governments – to resist the neo-liberal policy agenda. Departures from this consensus are described as departures, not from ‘neo-liberal’ or even ‘liberal’ constitutionalism, but as departures from constitutionalism as such. We could ‘thin down’ the idea of constitutionalism quite a bit without abandoning constitutionalism’s core commitment to avoiding arbitrary government action.