My series on the economics and politics of migration continually brought me back to Sinn Féin’s slump in the polls. The series found Ireland was not special when it comes to inward migration, nor were its reactions anything special.  Rapid changes in the composition of a society rarely are. The chart shows changes in population, and Ireland’s very rapid increase from 2022 to 2023 can be seen clearly.   If Ireland is not special when it comes to its reaction to immigration, where Ireland was special was the absence of a defined left/right political axis on which to centre questions of…