How else could mind-virus like philosophy or religion or science or political legitimacy transit highly-variable humans for generations?
Religious organizations, governments, corporations all far outlive their founders and maintainers. Heroes at best only stretch or squeeze the dogma or methodology to grow the organization by better fitting to the culture.
And because organizations accumulate control over resources, individuals can have little effect outside them.
We are disposable by design.
Somehow we need to contend with killdozers, school shooters, anthrax mailers, and so on being much more capable than anything even a particularly yoked antiquity nerd like Plato ever could be.
Not my idea though, greater minds than I have talked about this a lot: Neil Postman, Lewis Mumford, etc..