* Monday, “Socialism Would Mean Inspectors All Round,” 1929 British Conservative Party poster;
* Tuesday, “Come on, Dad! We’re going to vote Liberal,” 1929 British Liberal Party poster;
* Wednesday, “I Need Smokes,” World War One American poster;
* Thursday, Art Deco Prohibitionist traffic safety poster.
Update: and here’s Friday’s final installment, a contemporary freedom-of-the-press poster from Jordan.