[majewsky]

> It suggests that there's been a concerted effort among liberals to reshape culture as a whole.

It doesn't need to be concerted. An alternative explanation could be that liberals are more likely to pursue creative careers than conservatives, thus shaping the media (e.g. TV shows and movies) that contribute to the major consensus narrative.

Why that is so is not part of my hypothesis. The point is that the behavior of a system is emergent more often than it is concerted (which is also why most conspiracy theories are untrue).