Winning the hearts and minds. Translations: top left—Peace and freedom for the Sovietdom (Who is the giant red naked man? update: it’s Trotsky, and update: it’s an anti-communist poster—see comments.); top right—Tsar, Pope and the Rich; bottom left—Parasites and slackers do nothing and prevent others from working; bottom right—Red plowman. See many more of the posters here.