" In Superman number one, published in 1939, Clark and Lois Lane travel to a thinly disguised Nazi Germany, where Lois ends up in front of a firing squad, until Superman rescues her. In Superman number two, also from 1939, Clark Kent visits faux Germany again and meets Adolphus Runyan, a scientist clearly modeled on Adolf Hitler, who has discovered a gas so powerful “it is capable of penetrating any type of gas-mask.” The front cover of Captain Americanumber one, published in March 1941, shows the hero smashing Hitler across the face. "

― Bruce Feiler , America's Prophet: Moses and the American Story