How should political liberalism think of nationalism? Cyril makes very good points about what nationalist sentiments are and to what extent they can fit within liberal institutions.

In my book “Optimally Irrational”, I made the point that identity feelings act as a social glue, helping groups be more cohesive and cooperative. In that perspective, some form of national sentiment—not necessarily based on rigid in-group definitions like ethnicity—can help support a liberal social contract.