Unsurprised to see Marx here but imma go a step further and go with Gramsci, who codified the idea of pushing socialism by entering cultural institutions to break their functions down to serve the goals of socialism from within, which was then copy-pasted onto every modern social grievance by the Frankfurt school and shat out into the mouths of the last several decades of college students.
Italian fascism would've been way cooler if they cut off Gramsci's hands and/or just shot him instead of just letting him write in prison.