The rampant sexism in "Mad Men" was typical of the 1960s, when the outlook for women in America was just beginning to change. While the "second wave" of feminism began in the '60s, mainstream America was still very much a "man's world."
That attitude carried over into advertising, which did little to advance gender roles and ran ads that implied women were idiots who cared mostly about pleasing their men. Alcoa Aluminum
Here are some of advertising's most egregious sexist ads from that era.