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Too bad that "meme" came to mean the whatever-viral-image, rather than its original broader biological definition of any self-replicating social phenomenon. The specificization snipped a useful term for the reproduction/evolution of ideas/ideology, the way we pass along and create thought, deem it useful. Socrates' words living on in 2020 is a meme; Rupert Murdoch invented a memetic form of conservative dogma. The survivability of ideas. It's not propaganda but a much more supple thing, the ability to be not just striking images, but echoing on. To make ideology replicate, teach children thumbs up from thumbs down.