I think it might actually be the other way around.  To a large extent, Reddit&#x27;s competition for user attention consists of more typical &#x27;social media&#x27; sites like Twitter and Facebook, where people only see content shared by their friends and thus most will have little if any exposure to alien political viewpoints.*  It also includes smaller forums&#x2F;sites which support a single, relatively cohesive social community, with associated groupthink - such as this one.  Reddit is relatively uncommon in being large enough to support many separate communities - including ones that literally hate each other - coexisting on the same site, yet more centrally structured, less individualized than social media, giving those groups more visibility and exposure to each other.  I claim that this visibility is responsible for much of the impression that Reddit is especially prone to echo chambers, but in reality does the exact opposite: it nudges users in the direction of looking at the other side&#x27;s subreddit and seeing what they think.<p>(Not all of that impression; certainly upvote-downvote systems tend to exacerbate groupthink.  Even so.)<p>* Twitter in particular has the problem that if you want to interact with the other side, you have to pick a particular <i>person</i> to interact with; yet having someone you don&#x27;t know initiating conversation just to disagree with you is rather unpleasant, especially if you&#x27;re &quot;famous&quot; and end up with a lot of such conversations.  On Reddit at least you can address an entire subreddit and avoid targeting anyone personally.  You will probably be downvoted, which isn&#x27;t great, but...