You know, Superman seems like a square type, but I think SUPERMAN'S PAL JIMMY OLSEN with Kirby definitively proved that he's one cool, counterculture-loving cat, and this poster clinches it.
Superman a "square?" I think not. Not only did he pose for these "
peace posters," he also destroyed all of mankind's nuclear weapons in
Superman IV: The Quest for Peace - definitely the act of an optimistic peace-nik.