I bet this is a side effect of the internet and especially social media. Rapid spread of ideas/memes creates large zones of homogeneity, sort of like the fill-c

I bet this is a side effect of the internet and especially social media. Rapid spread of ideas/memes creates large zones of homogeneity, sort of like the fill-colour operation in paint programs. Suddenly we have "tribes", but with millions of people. The same phenomenon drives the homogeneous subgroups to extremes, since externally they define themselves in opposition to other subgroups, and internally they egg each other on, rewarding the members who find the most intense new ways to express the identity. It's not coordinated, except in the sense that the technology allows for forms of replication that never existed before. Because our brains don't expect that sort of world, this maps to a feeling of "it all seems so coordinated", even if we resist that explanation intellectually.