NSA posters and power

https://www.governmentattic.org/28docs/NSAsecurityPosters_1950s-60s.pdf These images show just how pervasive images were and remain to be. In a similar manner, memes today invoke the same sort of "call to action" Sure, it may not be about security or government secrets, but the meme imagines have a staying power in the consciousness of the internet subculture.