Is American political polarization inherently unique in some way?

Gonna take a break from “work issues” for one day and discuss political polarization briefly.
I’ll say this: some have recently called us “The United States of Nervous Wrecks,” and we’ve got research that this is one of the most socially-isolated, lonely times in American history. Even if you don’t vote — i.e. more than half of you — it’s hard to argue…