The fix is to build bridging systems — pro‑social media that elevate uncommon ground — nuanced, rarely discovered common ground rather than the loudest extremes. The bridging approach we prototyped years ago (e.g., Polis‑style deliberation) inspired what powers X’s Community Notes today and to “Notes” pilots on YouTube; Meta has also tested community note‑style labels attached to trending posts. These surface statements that draw up‑votes from otherwise opposed groups; the original poster can’t remove them. That is bridging.