Something about how they weren't afraid of making necessary changes and compromises if that was what it took, and political consensuses could be built even on things that seemed quite sacred not too long before.

The homogeneous population isn't really true anymore, either, with large immigrant populations in all of the Nordic countries now. That's not stopping them. They do perhaps still have an easier time of it to maintain national feeling (of the healthy kind that moves a nation forward, not the nationalist kind that only puts people in denial about the simplest of facts if they don't fit into their ideology), I'll grant you that. But if anything that only reinforces the message of how badly this polarization is hurting the US.