Has social media fundamentally broken political discourse, or just amplified existing divisions?

I've been watching the news and online discussions lately, and it feels like political debates are more polarized and less productive than ever. Is this a genuine breakdown of our ability to discuss issues rationally, or is social media merely giving a louder voice to pre-existing ideological divides? I'm genuinely curious about how others perceive its impact and if there's any hope for constructive dialogue to return.